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Finding the Fourth Proportional to 980.32, 1,352.74 and 560.76

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Solution

The fourth proportional to 980.32, 1,352.74 and 560.76 is: 773.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    980.32 : 1,352.74 = 560.76 : x
  2. Step 2: Convert to fraction form
    980.32/1,352.74 = 560.76/x
  3. Step 3: Cross multiply
    980.32x = 1,352.74 × 560.76
  4. Step 4: Simplify right side
    980.32x = 758,562.48
  5. Step 5: Solve for x
    x = 758,562.48/980.32
  6. Step 6: Final answer
    x = 773.79

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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.