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Finding the Fourth Proportional to 657.43, 985.30 and 349.43

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Solution

The fourth proportional to 657.43, 985.30 and 349.43 is: 523.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.43 : 985.30 = 349.43 : x
  2. Step 2: Convert to fraction form
    657.43/985.30 = 349.43/x
  3. Step 3: Cross multiply
    657.43x = 985.30 × 349.43
  4. Step 4: Simplify right side
    657.43x = 344,288.45
  5. Step 5: Solve for x
    x = 344,288.45/657.43
  6. Step 6: Final answer
    x = 523.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.