Home / 1,986.57-2,741.58-1,357.20

Finding the Fourth Proportional to 1,986.57, 2,741.58 and 1,357.20

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Solution

The fourth proportional to 1,986.57, 2,741.58 and 1,357.20 is: 1,873.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.57 : 2,741.58 = 1,357.20 : x
  2. Step 2: Convert to fraction form
    1,986.57/2,741.58 = 1,357.20/x
  3. Step 3: Cross multiply
    1,986.57x = 2,741.58 × 1,357.20
  4. Step 4: Simplify right side
    1,986.57x = 3,720,872.38
  5. Step 5: Solve for x
    x = 3,720,872.38/1,986.57
  6. Step 6: Final answer
    x = 1,873.01

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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.