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Finding the Fourth Proportional to 392,956.92, 589,693.50 and 215,588.52

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Solution

The fourth proportional to 392,956.92, 589,693.50 and 215,588.52 is: 323,524.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,956.92 : 589,693.50 = 215,588.52 : x
  2. Step 2: Convert to fraction form
    392,956.92/589,693.50 = 215,588.52/x
  3. Step 3: Cross multiply
    392,956.92x = 589,693.50 × 215,588.52
  4. Step 4: Simplify right side
    392,956.92x = 127,131,148,918.62
  5. Step 5: Solve for x
    x = 127,131,148,918.62/392,956.92
  6. Step 6: Final answer
    x = 323,524.39

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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.