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Finding the Fourth Proportional to 696.53, 961.18 and 386.03

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Solution

The fourth proportional to 696.53, 961.18 and 386.03 is: 532.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.53 : 961.18 = 386.03 : x
  2. Step 2: Convert to fraction form
    696.53/961.18 = 386.03/x
  3. Step 3: Cross multiply
    696.53x = 961.18 × 386.03
  4. Step 4: Simplify right side
    696.53x = 371,044.32
  5. Step 5: Solve for x
    x = 371,044.32/696.53
  6. Step 6: Final answer
    x = 532.70

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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.