Home / 2,850.30-3,931.15-1,731.20

Finding the Fourth Proportional to 2,850.30, 3,931.15 and 1,731.20

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Solution

The fourth proportional to 2,850.30, 3,931.15 and 1,731.20 is: 2,387.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,850.30 : 3,931.15 = 1,731.20 : x
  2. Step 2: Convert to fraction form
    2,850.30/3,931.15 = 1,731.20/x
  3. Step 3: Cross multiply
    2,850.30x = 3,931.15 × 1,731.20
  4. Step 4: Simplify right side
    2,850.30x = 6,805,625.73
  5. Step 5: Solve for x
    x = 6,805,625.73/2,850.30
  6. Step 6: Final answer
    x = 2,387.69

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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.