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Finding the Fourth Proportional to 658,906.60, 988,359.90 and 392,967.40

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Solution

The fourth proportional to 658,906.60, 988,359.90 and 392,967.40 is: 589,451.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,906.60 : 988,359.90 = 392,967.40 : x
  2. Step 2: Convert to fraction form
    658,906.60/988,359.90 = 392,967.40/x
  3. Step 3: Cross multiply
    658,906.60x = 988,359.90 × 392,967.40
  4. Step 4: Simplify right side
    658,906.60x = 388,393,220,167.26
  5. Step 5: Solve for x
    x = 388,393,220,167.26/658,906.60
  6. Step 6: Final answer
    x = 589,451.10

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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.