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Finding the Fourth Proportional to 614.20, 847.65 and 439.96

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Solution

The fourth proportional to 614.20, 847.65 and 439.96 is: 607.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.20 : 847.65 = 439.96 : x
  2. Step 2: Convert to fraction form
    614.20/847.65 = 439.96/x
  3. Step 3: Cross multiply
    614.20x = 847.65 × 439.96
  4. Step 4: Simplify right side
    614.20x = 372,932.09
  5. Step 5: Solve for x
    x = 372,932.09/614.20
  6. Step 6: Final answer
    x = 607.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.