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Finding the Fourth Proportional to 696.38, 961.03 and 385.88

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Solution

The fourth proportional to 696.38, 961.03 and 385.88 is: 532.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.38 : 961.03 = 385.88 : x
  2. Step 2: Convert to fraction form
    696.38/961.03 = 385.88/x
  3. Step 3: Cross multiply
    696.38x = 961.03 × 385.88
  4. Step 4: Simplify right side
    696.38x = 370,842.26
  5. Step 5: Solve for x
    x = 370,842.26/696.38
  6. Step 6: Final answer
    x = 532.53

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Double scale
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1.5x scale

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.