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Finding the Fourth Proportional to 728.10, 1,091.95 and 496.94

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Solution

The fourth proportional to 728.10, 1,091.95 and 496.94 is: 745.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    728.10 : 1,091.95 = 496.94 : x
  2. Step 2: Convert to fraction form
    728.10/1,091.95 = 496.94/x
  3. Step 3: Cross multiply
    728.10x = 1,091.95 × 496.94
  4. Step 4: Simplify right side
    728.10x = 542,633.63
  5. Step 5: Solve for x
    x = 542,633.63/728.10
  6. Step 6: Final answer
    x = 745.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.