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Finding the Fourth Proportional to 757.47, 1,044.46 and 491.56

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Solution

The fourth proportional to 757.47, 1,044.46 and 491.56 is: 677.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    757.47 : 1,044.46 = 491.56 : x
  2. Step 2: Convert to fraction form
    757.47/1,044.46 = 491.56/x
  3. Step 3: Cross multiply
    757.47x = 1,044.46 × 491.56
  4. Step 4: Simplify right side
    757.47x = 513,412.76
  5. Step 5: Solve for x
    x = 513,412.76/757.47
  6. Step 6: Final answer
    x = 677.80

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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.