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Finding the Fourth Proportional to 630.15, 868.47 and 483.13

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Solution

The fourth proportional to 630.15, 868.47 and 483.13 is: 665.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.15 : 868.47 = 483.13 : x
  2. Step 2: Convert to fraction form
    630.15/868.47 = 483.13/x
  3. Step 3: Cross multiply
    630.15x = 868.47 × 483.13
  4. Step 4: Simplify right side
    630.15x = 419,585.90
  5. Step 5: Solve for x
    x = 419,585.90/630.15
  6. Step 6: Final answer
    x = 665.85

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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.