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Finding the Fourth Proportional to 1,042.44, 1,565.24 and 827.76

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Solution

The fourth proportional to 1,042.44, 1,565.24 and 827.76 is: 1,242.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,042.44 : 1,565.24 = 827.76 : x
  2. Step 2: Convert to fraction form
    1,042.44/1,565.24 = 827.76/x
  3. Step 3: Cross multiply
    1,042.44x = 1,565.24 × 827.76
  4. Step 4: Simplify right side
    1,042.44x = 1,295,643.06
  5. Step 5: Solve for x
    x = 1,295,643.06/1,042.44
  6. Step 6: Final answer
    x = 1,242.89

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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.