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Finding the Fourth Proportional to 758.31, 1,128.69 and 741.30

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Solution

The fourth proportional to 758.31, 1,128.69 and 741.30 is: 1,103.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.31 : 1,128.69 = 741.30 : x
  2. Step 2: Convert to fraction form
    758.31/1,128.69 = 741.30/x
  3. Step 3: Cross multiply
    758.31x = 1,128.69 × 741.30
  4. Step 4: Simplify right side
    758.31x = 836,697.90
  5. Step 5: Solve for x
    x = 836,697.90/758.31
  6. Step 6: Final answer
    x = 1,103.37

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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.