Home / 1,986.31-2,738.10-1,565.92

Finding the Fourth Proportional to 1,986.31, 2,738.10 and 1,565.92

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Solution

The fourth proportional to 1,986.31, 2,738.10 and 1,565.92 is: 2,158.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.31 : 2,738.10 = 1,565.92 : x
  2. Step 2: Convert to fraction form
    1,986.31/2,738.10 = 1,565.92/x
  3. Step 3: Cross multiply
    1,986.31x = 2,738.10 × 1,565.92
  4. Step 4: Simplify right side
    1,986.31x = 4,287,645.55
  5. Step 5: Solve for x
    x = 4,287,645.55/1,986.31
  6. Step 6: Final answer
    x = 2,158.60

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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.