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Finding the Fourth Proportional to 750.64, 1,120 and 744.88

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Solution

The fourth proportional to 750.64, 1,120 and 744.88 is: 1,111.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.64 : 1,120 = 744.88 : x
  2. Step 2: Convert to fraction form
    750.64/1,120 = 744.88/x
  3. Step 3: Cross multiply
    750.64x = 1,120 × 744.88
  4. Step 4: Simplify right side
    750.64x = 834,265.60
  5. Step 5: Solve for x
    x = 834,265.60/750.64
  6. Step 6: Final answer
    x = 1,111.41

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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.