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Finding the Fourth Proportional to 698.76, 963.86 and 449.96

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Solution

The fourth proportional to 698.76, 963.86 and 449.96 is: 620.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.76 : 963.86 = 449.96 : x
  2. Step 2: Convert to fraction form
    698.76/963.86 = 449.96/x
  3. Step 3: Cross multiply
    698.76x = 963.86 × 449.96
  4. Step 4: Simplify right side
    698.76x = 433,691.38
  5. Step 5: Solve for x
    x = 433,691.38/698.76
  6. Step 6: Final answer
    x = 620.66

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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.