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Finding the Fourth Proportional to 1,092.32, 1,639.44 and 817.52

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Solution

The fourth proportional to 1,092.32, 1,639.44 and 817.52 is: 1,227.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,092.32 : 1,639.44 = 817.52 : x
  2. Step 2: Convert to fraction form
    1,092.32/1,639.44 = 817.52/x
  3. Step 3: Cross multiply
    1,092.32x = 1,639.44 × 817.52
  4. Step 4: Simplify right side
    1,092.32x = 1,340,274.99
  5. Step 5: Solve for x
    x = 1,340,274.99/1,092.32
  6. Step 6: Final answer
    x = 1,227.00

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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.