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Finding the Fourth Proportional to 1,356.13, 2,034.82 and 738.91

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Solution

The fourth proportional to 1,356.13, 2,034.82 and 738.91 is: 1,108.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,356.13 : 2,034.82 = 738.91 : x
  2. Step 2: Convert to fraction form
    1,356.13/2,034.82 = 738.91/x
  3. Step 3: Cross multiply
    1,356.13x = 2,034.82 × 738.91
  4. Step 4: Simplify right side
    1,356.13x = 1,503,548.85
  5. Step 5: Solve for x
    x = 1,503,548.85/1,356.13
  6. Step 6: Final answer
    x = 1,108.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.