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Finding the Fourth Proportional to 518,757.60, 776,581.20 and 487,999.20

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Solution

The fourth proportional to 518,757.60, 776,581.20 and 487,999.20 is: 730,535.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,757.60 : 776,581.20 = 487,999.20 : x
  2. Step 2: Convert to fraction form
    518,757.60/776,581.20 = 487,999.20/x
  3. Step 3: Cross multiply
    518,757.60x = 776,581.20 × 487,999.20
  4. Step 4: Simplify right side
    518,757.60x = 378,971,004,335.04
  5. Step 5: Solve for x
    x = 378,971,004,335.04/518,757.60
  6. Step 6: Final answer
    x = 730,535.81

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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.