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Finding the Fourth Proportional to 757.86, 1,131.02 and 738.42

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Solution

The fourth proportional to 757.86, 1,131.02 and 738.42 is: 1,102.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    757.86 : 1,131.02 = 738.42 : x
  2. Step 2: Convert to fraction form
    757.86/1,131.02 = 738.42/x
  3. Step 3: Cross multiply
    757.86x = 1,131.02 × 738.42
  4. Step 4: Simplify right side
    757.86x = 835,167.79
  5. Step 5: Solve for x
    x = 835,167.79/757.86
  6. Step 6: Final answer
    x = 1,102.01

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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.