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Finding the Fourth Proportional to 538,666.60, 807,999.90 and 239,031.40

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Solution

The fourth proportional to 538,666.60, 807,999.90 and 239,031.40 is: 358,547.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,666.60 : 807,999.90 = 239,031.40 : x
  2. Step 2: Convert to fraction form
    538,666.60/807,999.90 = 239,031.40/x
  3. Step 3: Cross multiply
    538,666.60x = 807,999.90 × 239,031.40
  4. Step 4: Simplify right side
    538,666.60x = 193,137,347,296.86
  5. Step 5: Solve for x
    x = 193,137,347,296.86/538,666.60
  6. Step 6: Final answer
    x = 358,547.10

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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.