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Finding the Fourth Proportional to 3,902.80, 5,854.20 and 1,954.30

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Solution

The fourth proportional to 3,902.80, 5,854.20 and 1,954.30 is: 2,931.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,902.80 : 5,854.20 = 1,954.30 : x
  2. Step 2: Convert to fraction form
    3,902.80/5,854.20 = 1,954.30/x
  3. Step 3: Cross multiply
    3,902.80x = 5,854.20 × 1,954.30
  4. Step 4: Simplify right side
    3,902.80x = 11,440,863.06
  5. Step 5: Solve for x
    x = 11,440,863.06/3,902.80
  6. Step 6: Final answer
    x = 2,931.45

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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.