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Finding the Fourth Proportional to 1,132.88, 1,563.74 and 660.88

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Solution

The fourth proportional to 1,132.88, 1,563.74 and 660.88 is: 912.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,132.88 : 1,563.74 = 660.88 : x
  2. Step 2: Convert to fraction form
    1,132.88/1,563.74 = 660.88/x
  3. Step 3: Cross multiply
    1,132.88x = 1,563.74 × 660.88
  4. Step 4: Simplify right side
    1,132.88x = 1,033,444.49
  5. Step 5: Solve for x
    x = 1,033,444.49/1,132.88
  6. Step 6: Final answer
    x = 912.23

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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.