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Finding the Fourth Proportional to 691.86, 952.22 and 551.53

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Solution

The fourth proportional to 691.86, 952.22 and 551.53 is: 759.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.86 : 952.22 = 551.53 : x
  2. Step 2: Convert to fraction form
    691.86/952.22 = 551.53/x
  3. Step 3: Cross multiply
    691.86x = 952.22 × 551.53
  4. Step 4: Simplify right side
    691.86x = 525,175.11
  5. Step 5: Solve for x
    x = 525,175.11/691.86
  6. Step 6: Final answer
    x = 759.08

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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.