Home / 1,987.77-2,741.85-1,280.52

Finding the Fourth Proportional to 1,987.77, 2,741.85 and 1,280.52

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Solution

The fourth proportional to 1,987.77, 2,741.85 and 1,280.52 is: 1,766.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.77 : 2,741.85 = 1,280.52 : x
  2. Step 2: Convert to fraction form
    1,987.77/2,741.85 = 1,280.52/x
  3. Step 3: Cross multiply
    1,987.77x = 2,741.85 × 1,280.52
  4. Step 4: Simplify right side
    1,987.77x = 3,510,993.76
  5. Step 5: Solve for x
    x = 3,510,993.76/1,987.77
  6. Step 6: Final answer
    x = 1,766.30

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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.