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Finding the Fourth Proportional to 521,424.34, 781,825.88 and 161,488.56

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Solution

The fourth proportional to 521,424.34, 781,825.88 and 161,488.56 is: 242,136.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,424.34 : 781,825.88 = 161,488.56 : x
  2. Step 2: Convert to fraction form
    521,424.34/781,825.88 = 161,488.56/x
  3. Step 3: Cross multiply
    521,424.34x = 781,825.88 × 161,488.56
  4. Step 4: Simplify right side
    521,424.34x = 126,255,935,531.93
  5. Step 5: Solve for x
    x = 126,255,935,531.93/521,424.34
  6. Step 6: Final answer
    x = 242,136.64

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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.