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Finding the Fourth Proportional to 748.49, 1,118.42 and 571.82

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Solution

The fourth proportional to 748.49, 1,118.42 and 571.82 is: 854.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    748.49 : 1,118.42 = 571.82 : x
  2. Step 2: Convert to fraction form
    748.49/1,118.42 = 571.82/x
  3. Step 3: Cross multiply
    748.49x = 1,118.42 × 571.82
  4. Step 4: Simplify right side
    748.49x = 639,534.92
  5. Step 5: Solve for x
    x = 639,534.92/748.49
  6. Step 6: Final answer
    x = 854.43

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.