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Finding the Fourth Proportional to 3,874.79, 5,337.80 and 2,878.34

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Solution

The fourth proportional to 3,874.79, 5,337.80 and 2,878.34 is: 3,965.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,874.79 : 5,337.80 = 2,878.34 : x
  2. Step 2: Convert to fraction form
    3,874.79/5,337.80 = 2,878.34/x
  3. Step 3: Cross multiply
    3,874.79x = 5,337.80 × 2,878.34
  4. Step 4: Simplify right side
    3,874.79x = 15,363,972.97
  5. Step 5: Solve for x
    x = 15,363,972.97/3,874.79
  6. Step 6: Final answer
    x = 3,965.11

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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.