Home / 780,014.80-1,170,022.20-425,720.80

Finding the Fourth Proportional to 780,014.80, 1,170,022.20 and 425,720.80

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Solution

The fourth proportional to 780,014.80, 1,170,022.20 and 425,720.80 is: 638,581.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,014.80 : 1,170,022.20 = 425,720.80 : x
  2. Step 2: Convert to fraction form
    780,014.80/1,170,022.20 = 425,720.80/x
  3. Step 3: Cross multiply
    780,014.80x = 1,170,022.20 × 425,720.80
  4. Step 4: Simplify right side
    780,014.80x = 498,102,787,001.76
  5. Step 5: Solve for x
    x = 498,102,787,001.76/780,014.80
  6. Step 6: Final answer
    x = 638,581.20

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1.5x scale

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.