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Finding the Fourth Proportional to 1,132.76, 1,563.90 and 912.98

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Solution

The fourth proportional to 1,132.76, 1,563.90 and 912.98 is: 1,260.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,132.76 : 1,563.90 = 912.98 : x
  2. Step 2: Convert to fraction form
    1,132.76/1,563.90 = 912.98/x
  3. Step 3: Cross multiply
    1,132.76x = 1,563.90 × 912.98
  4. Step 4: Simplify right side
    1,132.76x = 1,427,809.42
  5. Step 5: Solve for x
    x = 1,427,809.42/1,132.76
  6. Step 6: Final answer
    x = 1,260.47

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Half scale
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Double scale
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1.5x scale

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.