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Finding the Fourth Proportional to 630.60, 868.84 and 551.32

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Solution

The fourth proportional to 630.60, 868.84 and 551.32 is: 759.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.60 : 868.84 = 551.32 : x
  2. Step 2: Convert to fraction form
    630.60/868.84 = 551.32/x
  3. Step 3: Cross multiply
    630.60x = 868.84 × 551.32
  4. Step 4: Simplify right side
    630.60x = 479,008.87
  5. Step 5: Solve for x
    x = 479,008.87/630.60
  6. Step 6: Final answer
    x = 759.61

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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.