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Finding the Fourth Proportional to 1,169.52, 1,750.56 and 821.22

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Solution

The fourth proportional to 1,169.52, 1,750.56 and 821.22 is: 1,229.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,169.52 : 1,750.56 = 821.22 : x
  2. Step 2: Convert to fraction form
    1,169.52/1,750.56 = 821.22/x
  3. Step 3: Cross multiply
    1,169.52x = 1,750.56 × 821.22
  4. Step 4: Simplify right side
    1,169.52x = 1,437,594.88
  5. Step 5: Solve for x
    x = 1,437,594.88/1,169.52
  6. Step 6: Final answer
    x = 1,229.22

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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.