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Finding the Fourth Proportional to 475.92, 657.18 and 351.80

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Solution

The fourth proportional to 475.92, 657.18 and 351.80 is: 485.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.92 : 657.18 = 351.80 : x
  2. Step 2: Convert to fraction form
    475.92/657.18 = 351.80/x
  3. Step 3: Cross multiply
    475.92x = 657.18 × 351.80
  4. Step 4: Simplify right side
    475.92x = 231,192.64
  5. Step 5: Solve for x
    x = 231,192.64/475.92
  6. Step 6: Final answer
    x = 485.78

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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.