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Finding the Fourth Proportional to 391,606.20, 587,409.30 and 371,388.60

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Solution

The fourth proportional to 391,606.20, 587,409.30 and 371,388.60 is: 557,082.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,606.20 : 587,409.30 = 371,388.60 : x
  2. Step 2: Convert to fraction form
    391,606.20/587,409.30 = 371,388.60/x
  3. Step 3: Cross multiply
    391,606.20x = 587,409.30 × 371,388.60
  4. Step 4: Simplify right side
    391,606.20x = 218,157,117,553.98
  5. Step 5: Solve for x
    x = 218,157,117,553.98/391,606.20
  6. Step 6: Final answer
    x = 557,082.90

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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.