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Finding the Fourth Proportional to 475.18, 656.67 and 386.48

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Solution

The fourth proportional to 475.18, 656.67 and 386.48 is: 534.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.18 : 656.67 = 386.48 : x
  2. Step 2: Convert to fraction form
    475.18/656.67 = 386.48/x
  3. Step 3: Cross multiply
    475.18x = 656.67 × 386.48
  4. Step 4: Simplify right side
    475.18x = 253,789.82
  5. Step 5: Solve for x
    x = 253,789.82/475.18
  6. Step 6: Final answer
    x = 534.09

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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.