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Finding the Fourth Proportional to 2,876.76, 3,969 and 1,758.42

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Solution

The fourth proportional to 2,876.76, 3,969 and 1,758.42 is: 2,426.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,876.76 : 3,969 = 1,758.42 : x
  2. Step 2: Convert to fraction form
    2,876.76/3,969 = 1,758.42/x
  3. Step 3: Cross multiply
    2,876.76x = 3,969 × 1,758.42
  4. Step 4: Simplify right side
    2,876.76x = 6,979,168.98
  5. Step 5: Solve for x
    x = 6,979,168.98/2,876.76
  6. Step 6: Final answer
    x = 2,426.05

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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.