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Finding the Fourth Proportional to 391,793.34, 587,345.40 and 155,302.02

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Solution

The fourth proportional to 391,793.34, 587,345.40 and 155,302.02 is: 232,816.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,793.34 : 587,345.40 = 155,302.02 : x
  2. Step 2: Convert to fraction form
    391,793.34/587,345.40 = 155,302.02/x
  3. Step 3: Cross multiply
    391,793.34x = 587,345.40 × 155,302.02
  4. Step 4: Simplify right side
    391,793.34x = 91,215,927,057.71
  5. Step 5: Solve for x
    x = 91,215,927,057.71/391,793.34
  6. Step 6: Final answer
    x = 232,816.43

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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.