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Finding the Fourth Proportional to 744.48, 1,020.12 and 739.68

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Solution

The fourth proportional to 744.48, 1,020.12 and 739.68 is: 1,013.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.48 : 1,020.12 = 739.68 : x
  2. Step 2: Convert to fraction form
    744.48/1,020.12 = 739.68/x
  3. Step 3: Cross multiply
    744.48x = 1,020.12 × 739.68
  4. Step 4: Simplify right side
    744.48x = 754,562.36
  5. Step 5: Solve for x
    x = 754,562.36/744.48
  6. Step 6: Final answer
    x = 1,013.54

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.