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Finding the Fourth Proportional to 834.18, 1,151.33 and 553.92

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Solution

The fourth proportional to 834.18, 1,151.33 and 553.92 is: 764.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    834.18 : 1,151.33 = 553.92 : x
  2. Step 2: Convert to fraction form
    834.18/1,151.33 = 553.92/x
  3. Step 3: Cross multiply
    834.18x = 1,151.33 × 553.92
  4. Step 4: Simplify right side
    834.18x = 637,741.94
  5. Step 5: Solve for x
    x = 637,741.94/834.18
  6. Step 6: Final answer
    x = 764.51

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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.