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Finding the Fourth Proportional to 910.28, 1,371.56 and 751.52

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Solution

The fourth proportional to 910.28, 1,371.56 and 751.52 is: 1,132.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.28 : 1,371.56 = 751.52 : x
  2. Step 2: Convert to fraction form
    910.28/1,371.56 = 751.52/x
  3. Step 3: Cross multiply
    910.28x = 1,371.56 × 751.52
  4. Step 4: Simplify right side
    910.28x = 1,030,754.77
  5. Step 5: Solve for x
    x = 1,030,754.77/910.28
  6. Step 6: Final answer
    x = 1,132.35

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.