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Finding the Fourth Proportional to 634.82, 875.72 and 551.74

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Solution

The fourth proportional to 634.82, 875.72 and 551.74 is: 761.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.82 : 875.72 = 551.74 : x
  2. Step 2: Convert to fraction form
    634.82/875.72 = 551.74/x
  3. Step 3: Cross multiply
    634.82x = 875.72 × 551.74
  4. Step 4: Simplify right side
    634.82x = 483,169.75
  5. Step 5: Solve for x
    x = 483,169.75/634.82
  6. Step 6: Final answer
    x = 761.11

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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.