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Finding the Fourth Proportional to 2,871.58, 3,960.93 and 1,974.91

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Solution

The fourth proportional to 2,871.58, 3,960.93 and 1,974.91 is: 2,724.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,871.58 : 3,960.93 = 1,974.91 : x
  2. Step 2: Convert to fraction form
    2,871.58/3,960.93 = 1,974.91/x
  3. Step 3: Cross multiply
    2,871.58x = 3,960.93 × 1,974.91
  4. Step 4: Simplify right side
    2,871.58x = 7,822,480.27
  5. Step 5: Solve for x
    x = 7,822,480.27/2,871.58
  6. Step 6: Final answer
    x = 2,724.10

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Similar ratio
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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.