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Finding the Fourth Proportional to 489,127.40, 733,691.10 and 431,390.60

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Solution

The fourth proportional to 489,127.40, 733,691.10 and 431,390.60 is: 647,085.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,127.40 : 733,691.10 = 431,390.60 : x
  2. Step 2: Convert to fraction form
    489,127.40/733,691.10 = 431,390.60/x
  3. Step 3: Cross multiply
    489,127.40x = 733,691.10 × 431,390.60
  4. Step 4: Simplify right side
    489,127.40x = 316,507,443,843.66
  5. Step 5: Solve for x
    x = 316,507,443,843.66/489,127.40
  6. Step 6: Final answer
    x = 647,085.90

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Similar ratio
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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.