Home / 2,128.30-3,192.45-1,974.70

Finding the Fourth Proportional to 2,128.30, 3,192.45 and 1,974.70

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Solution

The fourth proportional to 2,128.30, 3,192.45 and 1,974.70 is: 2,962.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128.30 : 3,192.45 = 1,974.70 : x
  2. Step 2: Convert to fraction form
    2,128.30/3,192.45 = 1,974.70/x
  3. Step 3: Cross multiply
    2,128.30x = 3,192.45 × 1,974.70
  4. Step 4: Simplify right side
    2,128.30x = 6,304,131.02
  5. Step 5: Solve for x
    x = 6,304,131.02/2,128.30
  6. Step 6: Final answer
    x = 2,962.05

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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.