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Finding the Fourth Proportional to 2,778.75, 3,833.06 and 1,731.15

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Solution

The fourth proportional to 2,778.75, 3,833.06 and 1,731.15 is: 2,387.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,778.75 : 3,833.06 = 1,731.15 : x
  2. Step 2: Convert to fraction form
    2,778.75/3,833.06 = 1,731.15/x
  3. Step 3: Cross multiply
    2,778.75x = 3,833.06 × 1,731.15
  4. Step 4: Simplify right side
    2,778.75x = 6,635,593.16
  5. Step 5: Solve for x
    x = 6,635,593.16/2,778.75
  6. Step 6: Final answer
    x = 2,387.98

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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.