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Finding the Fourth Proportional to 697.92, 961.92 and 511.14

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Solution

The fourth proportional to 697.92, 961.92 and 511.14 is: 704.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.92 : 961.92 = 511.14 : x
  2. Step 2: Convert to fraction form
    697.92/961.92 = 511.14/x
  3. Step 3: Cross multiply
    697.92x = 961.92 × 511.14
  4. Step 4: Simplify right side
    697.92x = 491,675.79
  5. Step 5: Solve for x
    x = 491,675.79/697.92
  6. Step 6: Final answer
    x = 704.49

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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.