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Finding the Fourth Proportional to 475.98, 656.59 and 397.68

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Solution

The fourth proportional to 475.98, 656.59 and 397.68 is: 548.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.98 : 656.59 = 397.68 : x
  2. Step 2: Convert to fraction form
    475.98/656.59 = 397.68/x
  3. Step 3: Cross multiply
    475.98x = 656.59 × 397.68
  4. Step 4: Simplify right side
    475.98x = 261,117.22
  5. Step 5: Solve for x
    x = 261,117.22/475.98
  6. Step 6: Final answer
    x = 548.59

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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.