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Finding the Fourth Proportional to 475.88, 656.87 and 318.83

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Solution

The fourth proportional to 475.88, 656.87 and 318.83 is: 440.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.88 : 656.87 = 318.83 : x
  2. Step 2: Convert to fraction form
    475.88/656.87 = 318.83/x
  3. Step 3: Cross multiply
    475.88x = 656.87 × 318.83
  4. Step 4: Simplify right side
    475.88x = 209,424.98
  5. Step 5: Solve for x
    x = 209,424.98/475.88
  6. Step 6: Final answer
    x = 440.08

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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.