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Finding the Fourth Proportional to 479,681.76, 719,397.18 and 142,631.64

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Solution

The fourth proportional to 479,681.76, 719,397.18 and 142,631.64 is: 213,910.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,681.76 : 719,397.18 = 142,631.64 : x
  2. Step 2: Convert to fraction form
    479,681.76/719,397.18 = 142,631.64/x
  3. Step 3: Cross multiply
    479,681.76x = 719,397.18 × 142,631.64
  4. Step 4: Simplify right side
    479,681.76x = 102,608,799,594.78
  5. Step 5: Solve for x
    x = 102,608,799,594.78/479,681.76
  6. Step 6: Final answer
    x = 213,910.15

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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.