Home / 1,986.83-2,741.95-1,397.55

Finding the Fourth Proportional to 1,986.83, 2,741.95 and 1,397.55

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Solution

The fourth proportional to 1,986.83, 2,741.95 and 1,397.55 is: 1,928.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.83 : 2,741.95 = 1,397.55 : x
  2. Step 2: Convert to fraction form
    1,986.83/2,741.95 = 1,397.55/x
  3. Step 3: Cross multiply
    1,986.83x = 2,741.95 × 1,397.55
  4. Step 4: Simplify right side
    1,986.83x = 3,832,024.25
  5. Step 5: Solve for x
    x = 3,832,024.25/1,986.83
  6. Step 6: Final answer
    x = 1,928.71

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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.