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Finding the Fourth Proportional to 634.64, 875.11 and 551.03

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Solution

The fourth proportional to 634.64, 875.11 and 551.03 is: 759.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.64 : 875.11 = 551.03 : x
  2. Step 2: Convert to fraction form
    634.64/875.11 = 551.03/x
  3. Step 3: Cross multiply
    634.64x = 875.11 × 551.03
  4. Step 4: Simplify right side
    634.64x = 482,211.86
  5. Step 5: Solve for x
    x = 482,211.86/634.64
  6. Step 6: Final answer
    x = 759.82

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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.