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Finding the Fourth Proportional to 657.15, 985.19 and 349.35

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Solution

The fourth proportional to 657.15, 985.19 and 349.35 is: 523.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.15 : 985.19 = 349.35 : x
  2. Step 2: Convert to fraction form
    657.15/985.19 = 349.35/x
  3. Step 3: Cross multiply
    657.15x = 985.19 × 349.35
  4. Step 4: Simplify right side
    657.15x = 344,174.38
  5. Step 5: Solve for x
    x = 344,174.38/657.15
  6. Step 6: Final answer
    x = 523.74

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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.