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Finding the Fourth Proportional to 2,781.76, 4,172.64 and 833.92

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Solution

The fourth proportional to 2,781.76, 4,172.64 and 833.92 is: 1,250.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,781.76 : 4,172.64 = 833.92 : x
  2. Step 2: Convert to fraction form
    2,781.76/4,172.64 = 833.92/x
  3. Step 3: Cross multiply
    2,781.76x = 4,172.64 × 833.92
  4. Step 4: Simplify right side
    2,781.76x = 3,479,647.95
  5. Step 5: Solve for x
    x = 3,479,647.95/2,781.76
  6. Step 6: Final answer
    x = 1,250.88

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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.