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Finding the Fourth Proportional to 696.60, 961.74 and 500.76

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Solution

The fourth proportional to 696.60, 961.74 and 500.76 is: 691.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.60 : 961.74 = 500.76 : x
  2. Step 2: Convert to fraction form
    696.60/961.74 = 500.76/x
  3. Step 3: Cross multiply
    696.60x = 961.74 × 500.76
  4. Step 4: Simplify right side
    696.60x = 481,600.92
  5. Step 5: Solve for x
    x = 481,600.92/696.60
  6. Step 6: Final answer
    x = 691.36

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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.