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Finding the Fourth Proportional to 3,391.40, 4,680.02 and 1,878.90

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Solution

The fourth proportional to 3,391.40, 4,680.02 and 1,878.90 is: 2,592.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,391.40 : 4,680.02 = 1,878.90 : x
  2. Step 2: Convert to fraction form
    3,391.40/4,680.02 = 1,878.90/x
  3. Step 3: Cross multiply
    3,391.40x = 4,680.02 × 1,878.90
  4. Step 4: Simplify right side
    3,391.40x = 8,793,276.73
  5. Step 5: Solve for x
    x = 8,793,276.73/3,391.40
  6. Step 6: Final answer
    x = 2,592.82

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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.