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Finding the Fourth Proportional to 658,889.10, 988,333.65 and 392,949.90

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Solution

The fourth proportional to 658,889.10, 988,333.65 and 392,949.90 is: 589,424.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,889.10 : 988,333.65 = 392,949.90 : x
  2. Step 2: Convert to fraction form
    658,889.10/988,333.65 = 392,949.90/x
  3. Step 3: Cross multiply
    658,889.10x = 988,333.65 × 392,949.90
  4. Step 4: Simplify right side
    658,889.10x = 388,365,608,934.14
  5. Step 5: Solve for x
    x = 388,365,608,934.14/658,889.10
  6. Step 6: Final answer
    x = 589,424.85

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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.