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Finding the Fourth Proportional to 440.52, 656.15 and 439.68

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Solution

The fourth proportional to 440.52, 656.15 and 439.68 is: 654.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.52 : 656.15 = 439.68 : x
  2. Step 2: Convert to fraction form
    440.52/656.15 = 439.68/x
  3. Step 3: Cross multiply
    440.52x = 656.15 × 439.68
  4. Step 4: Simplify right side
    440.52x = 288,496.03
  5. Step 5: Solve for x
    x = 288,496.03/440.52
  6. Step 6: Final answer
    x = 654.90

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.