Home / 2,972.40-4,099.24-2,382.80

Finding the Fourth Proportional to 2,972.40, 4,099.24 and 2,382.80

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Solution

The fourth proportional to 2,972.40, 4,099.24 and 2,382.80 is: 3,286.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,972.40 : 4,099.24 = 2,382.80 : x
  2. Step 2: Convert to fraction form
    2,972.40/4,099.24 = 2,382.80/x
  3. Step 3: Cross multiply
    2,972.40x = 4,099.24 × 2,382.80
  4. Step 4: Simplify right side
    2,972.40x = 9,767,669.07
  5. Step 5: Solve for x
    x = 9,767,669.07/2,972.40
  6. Step 6: Final answer
    x = 3,286.12

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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.