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Finding the Fourth Proportional to 658,008.40, 987,473.40 and 421,925.20

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Solution

The fourth proportional to 658,008.40, 987,473.40 and 421,925.20 is: 633,183.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,008.40 : 987,473.40 = 421,925.20 : x
  2. Step 2: Convert to fraction form
    658,008.40/987,473.40 = 421,925.20/x
  3. Step 3: Cross multiply
    658,008.40x = 987,473.40 × 421,925.20
  4. Step 4: Simplify right side
    658,008.40x = 416,639,911,789.68
  5. Step 5: Solve for x
    x = 416,639,911,789.68/658,008.40
  6. Step 6: Final answer
    x = 633,183.27

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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.