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Finding the Fourth Proportional to 749.33, 1,034.20 and 553.41

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Solution

The fourth proportional to 749.33, 1,034.20 and 553.41 is: 763.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.33 : 1,034.20 = 553.41 : x
  2. Step 2: Convert to fraction form
    749.33/1,034.20 = 553.41/x
  3. Step 3: Cross multiply
    749.33x = 1,034.20 × 553.41
  4. Step 4: Simplify right side
    749.33x = 572,337.31
  5. Step 5: Solve for x
    x = 572,337.31/749.33
  6. Step 6: Final answer
    x = 763.80

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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.