Home / 487,129.20-731,922.60-309,721.20

Finding the Fourth Proportional to 487,129.20, 731,922.60 and 309,721.20

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Solution

The fourth proportional to 487,129.20, 731,922.60 and 309,721.20 is: 465,363.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,129.20 : 731,922.60 = 309,721.20 : x
  2. Step 2: Convert to fraction form
    487,129.20/731,922.60 = 309,721.20/x
  3. Step 3: Cross multiply
    487,129.20x = 731,922.60 × 309,721.20
  4. Step 4: Simplify right side
    487,129.20x = 226,691,945,979.12
  5. Step 5: Solve for x
    x = 226,691,945,979.12/487,129.20
  6. Step 6: Final answer
    x = 465,363.08

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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.