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Finding the Fourth Proportional to 478,476.80, 717,691.33 and 178,935.35

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Solution

The fourth proportional to 478,476.80, 717,691.33 and 178,935.35 is: 268,394.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,476.80 : 717,691.33 = 178,935.35 : x
  2. Step 2: Convert to fraction form
    478,476.80/717,691.33 = 178,935.35/x
  3. Step 3: Cross multiply
    478,476.80x = 717,691.33 × 178,935.35
  4. Step 4: Simplify right side
    478,476.80x = 128,420,349,325.52
  5. Step 5: Solve for x
    x = 128,420,349,325.52/478,476.80
  6. Step 6: Final answer
    x = 268,394.10

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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.