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Finding the Fourth Proportional to 1,112.56, 1,666.24 and 563.40

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Solution

The fourth proportional to 1,112.56, 1,666.24 and 563.40 is: 843.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,112.56 : 1,666.24 = 563.40 : x
  2. Step 2: Convert to fraction form
    1,112.56/1,666.24 = 563.40/x
  3. Step 3: Cross multiply
    1,112.56x = 1,666.24 × 563.40
  4. Step 4: Simplify right side
    1,112.56x = 938,759.62
  5. Step 5: Solve for x
    x = 938,759.62/1,112.56
  6. Step 6: Final answer
    x = 843.78

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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.