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Finding the Fourth Proportional to 475.61, 656.28 and 279.11

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Solution

The fourth proportional to 475.61, 656.28 and 279.11 is: 385.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.61 : 656.28 = 279.11 : x
  2. Step 2: Convert to fraction form
    475.61/656.28 = 279.11/x
  3. Step 3: Cross multiply
    475.61x = 656.28 × 279.11
  4. Step 4: Simplify right side
    475.61x = 183,174.31
  5. Step 5: Solve for x
    x = 183,174.31/475.61
  6. Step 6: Final answer
    x = 385.14

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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.