Home / 1,225,863,768.80-1,691,727,738.08-668,982,687.20

Finding the Fourth Proportional to 1,225,863,768.80, 1,691,727,738.08 and 668,982,687.20

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Solution

The fourth proportional to 1,225,863,768.80, 1,691,727,738.08 and 668,982,687.20 is: 923,215,610.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,225,863,768.80 : 1,691,727,738.08 = 668,982,687.20 : x
  2. Step 2: Convert to fraction form
    1,225,863,768.80/1,691,727,738.08 = 668,982,687.20/x
  3. Step 3: Cross multiply
    1,225,863,768.80x = 1,691,727,738.08 × 668,982,687.20
  4. Step 4: Simplify right side
    1,225,863,768.80x = 1,131,736,568,231,536,256
  5. Step 5: Solve for x
    x = 1,131,736,568,231,536,256/1,225,863,768.80
  6. Step 6: Final answer
    x = 923,215,610.93

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Double scale
Find fourth proportional to 1,225,863,769.80, 1,691,727,739.46 and 668,982,688.20
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.