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Finding the Fourth Proportional to 832.91, 1,149.90 and 553.53

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Solution

The fourth proportional to 832.91, 1,149.90 and 553.53 is: 764.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    832.91 : 1,149.90 = 553.53 : x
  2. Step 2: Convert to fraction form
    832.91/1,149.90 = 553.53/x
  3. Step 3: Cross multiply
    832.91x = 1,149.90 × 553.53
  4. Step 4: Simplify right side
    832.91x = 636,504.15
  5. Step 5: Solve for x
    x = 636,504.15/832.91
  6. Step 6: Final answer
    x = 764.20

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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.