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Finding the Fourth Proportional to 2,579.86, 3,869.80 and 731.18

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Solution

The fourth proportional to 2,579.86, 3,869.80 and 731.18 is: 1,096.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,579.86 : 3,869.80 = 731.18 : x
  2. Step 2: Convert to fraction form
    2,579.86/3,869.80 = 731.18/x
  3. Step 3: Cross multiply
    2,579.86x = 3,869.80 × 731.18
  4. Step 4: Simplify right side
    2,579.86x = 2,829,520.36
  5. Step 5: Solve for x
    x = 2,829,520.36/2,579.86
  6. Step 6: Final answer
    x = 1,096.77

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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.