Home / 1,986.98-2,740.85-1,357.19

Finding the Fourth Proportional to 1,986.98, 2,740.85 and 1,357.19

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Solution

The fourth proportional to 1,986.98, 2,740.85 and 1,357.19 is: 1,872.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.98 : 2,740.85 = 1,357.19 : x
  2. Step 2: Convert to fraction form
    1,986.98/2,740.85 = 1,357.19/x
  3. Step 3: Cross multiply
    1,986.98x = 2,740.85 × 1,357.19
  4. Step 4: Simplify right side
    1,986.98x = 3,719,862.56
  5. Step 5: Solve for x
    x = 3,719,862.56/1,986.98
  6. Step 6: Final answer
    x = 1,872.12

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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.