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Finding the Fourth Proportional to 630.92, 868.65 and 617.15

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Solution

The fourth proportional to 630.92, 868.65 and 617.15 is: 849.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.92 : 868.65 = 617.15 : x
  2. Step 2: Convert to fraction form
    630.92/868.65 = 617.15/x
  3. Step 3: Cross multiply
    630.92x = 868.65 × 617.15
  4. Step 4: Simplify right side
    630.92x = 536,087.35
  5. Step 5: Solve for x
    x = 536,087.35/630.92
  6. Step 6: Final answer
    x = 849.69

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Half scale
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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.