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Finding the Fourth Proportional to 698.57, 963.05 and 499.49

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Solution

The fourth proportional to 698.57, 963.05 and 499.49 is: 688.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.57 : 963.05 = 499.49 : x
  2. Step 2: Convert to fraction form
    698.57/963.05 = 499.49/x
  3. Step 3: Cross multiply
    698.57x = 963.05 × 499.49
  4. Step 4: Simplify right side
    698.57x = 481,026.53
  5. Step 5: Solve for x
    x = 481,026.53/698.57
  6. Step 6: Final answer
    x = 688.59

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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.