Home / 780,079.80-1,170,119.70-306,780.60

Finding the Fourth Proportional to 780,079.80, 1,170,119.70 and 306,780.60

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Solution

The fourth proportional to 780,079.80, 1,170,119.70 and 306,780.60 is: 460,170.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,079.80 : 1,170,119.70 = 306,780.60 : x
  2. Step 2: Convert to fraction form
    780,079.80/1,170,119.70 = 306,780.60/x
  3. Step 3: Cross multiply
    780,079.80x = 1,170,119.70 × 306,780.60
  4. Step 4: Simplify right side
    780,079.80x = 358,970,023,637.82
  5. Step 5: Solve for x
    x = 358,970,023,637.82/780,079.80
  6. Step 6: Final answer
    x = 460,170.90

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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.