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Finding the Fourth Proportional to 475.59, 656.17 and 289.02

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Solution

The fourth proportional to 475.59, 656.17 and 289.02 is: 398.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.59 : 656.17 = 289.02 : x
  2. Step 2: Convert to fraction form
    475.59/656.17 = 289.02/x
  3. Step 3: Cross multiply
    475.59x = 656.17 × 289.02
  4. Step 4: Simplify right side
    475.59x = 189,646.25
  5. Step 5: Solve for x
    x = 189,646.25/475.59
  6. Step 6: Final answer
    x = 398.76

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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.