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Finding the Fourth Proportional to 2,921.96, 4,382.98 and 974.16

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Solution

The fourth proportional to 2,921.96, 4,382.98 and 974.16 is: 1,461.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,921.96 : 4,382.98 = 974.16 : x
  2. Step 2: Convert to fraction form
    2,921.96/4,382.98 = 974.16/x
  3. Step 3: Cross multiply
    2,921.96x = 4,382.98 × 974.16
  4. Step 4: Simplify right side
    2,921.96x = 4,269,723.80
  5. Step 5: Solve for x
    x = 4,269,723.80/2,921.96
  6. Step 6: Final answer
    x = 1,461.25

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Similar ratio
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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.