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Finding the Fourth Proportional to 399,031.20, 598,575.60 and 240,919.20

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Solution

The fourth proportional to 399,031.20, 598,575.60 and 240,919.20 is: 361,396.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,031.20 : 598,575.60 = 240,919.20 : x
  2. Step 2: Convert to fraction form
    399,031.20/598,575.60 = 240,919.20/x
  3. Step 3: Cross multiply
    399,031.20x = 598,575.60 × 240,919.20
  4. Step 4: Simplify right side
    399,031.20x = 144,208,354,691.52
  5. Step 5: Solve for x
    x = 144,208,354,691.52/399,031.20
  6. Step 6: Final answer
    x = 361,396.19

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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.