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Finding the Fourth Proportional to 3,560.76, 5,340.74 and 963.90

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Solution

The fourth proportional to 3,560.76, 5,340.74 and 963.90 is: 1,445.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,560.76 : 5,340.74 = 963.90 : x
  2. Step 2: Convert to fraction form
    3,560.76/5,340.74 = 963.90/x
  3. Step 3: Cross multiply
    3,560.76x = 5,340.74 × 963.90
  4. Step 4: Simplify right side
    3,560.76x = 5,147,939.29
  5. Step 5: Solve for x
    x = 5,147,939.29/3,560.76
  6. Step 6: Final answer
    x = 1,445.74

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1.5x scale

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.