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Finding the Fourth Proportional to 2,288.69, 3,432.81 and 728.63

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Solution

The fourth proportional to 2,288.69, 3,432.81 and 728.63 is: 1,092.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,288.69 : 3,432.81 = 728.63 : x
  2. Step 2: Convert to fraction form
    2,288.69/3,432.81 = 728.63/x
  3. Step 3: Cross multiply
    2,288.69x = 3,432.81 × 728.63
  4. Step 4: Simplify right side
    2,288.69x = 2,501,248.35
  5. Step 5: Solve for x
    x = 2,501,248.35/2,288.69
  6. Step 6: Final answer
    x = 1,092.87

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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.