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Finding the Fourth Proportional to 615.87, 922.34 and 395.80

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Solution

The fourth proportional to 615.87, 922.34 and 395.80 is: 592.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.87 : 922.34 = 395.80 : x
  2. Step 2: Convert to fraction form
    615.87/922.34 = 395.80/x
  3. Step 3: Cross multiply
    615.87x = 922.34 × 395.80
  4. Step 4: Simplify right side
    615.87x = 365,060.86
  5. Step 5: Solve for x
    x = 365,060.86/615.87
  6. Step 6: Final answer
    x = 592.76

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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.