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Finding the Fourth Proportional to 728.86, 1,092.56 and 295.70

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Solution

The fourth proportional to 728.86, 1,092.56 and 295.70 is: 443.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    728.86 : 1,092.56 = 295.70 : x
  2. Step 2: Convert to fraction form
    728.86/1,092.56 = 295.70/x
  3. Step 3: Cross multiply
    728.86x = 1,092.56 × 295.70
  4. Step 4: Simplify right side
    728.86x = 323,069.99
  5. Step 5: Solve for x
    x = 323,069.99/728.86
  6. Step 6: Final answer
    x = 443.25

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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.