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Finding the Fourth Proportional to 442,396.47, 663,592.64 and 138,812.85

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Solution

The fourth proportional to 442,396.47, 663,592.64 and 138,812.85 is: 208,218.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,396.47 : 663,592.64 = 138,812.85 : x
  2. Step 2: Convert to fraction form
    442,396.47/663,592.64 = 138,812.85/x
  3. Step 3: Cross multiply
    442,396.47x = 663,592.64 × 138,812.85
  4. Step 4: Simplify right side
    442,396.47x = 92,115,185,597.42
  5. Step 5: Solve for x
    x = 92,115,185,597.42/442,396.47
  6. Step 6: Final answer
    x = 208,218.63

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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.