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Finding the Fourth Proportional to 1,248.44, 1,722.55 and 806.27

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Solution

The fourth proportional to 1,248.44, 1,722.55 and 806.27 is: 1,112.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,248.44 : 1,722.55 = 806.27 : x
  2. Step 2: Convert to fraction form
    1,248.44/1,722.55 = 806.27/x
  3. Step 3: Cross multiply
    1,248.44x = 1,722.55 × 806.27
  4. Step 4: Simplify right side
    1,248.44x = 1,388,827.74
  5. Step 5: Solve for x
    x = 1,388,827.74/1,248.44
  6. Step 6: Final answer
    x = 1,112.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.