Home / 1,986.24-2,741.62-1,239.74

Finding the Fourth Proportional to 1,986.24, 2,741.62 and 1,239.74

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Solution

The fourth proportional to 1,986.24, 2,741.62 and 1,239.74 is: 1,711.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.24 : 2,741.62 = 1,239.74 : x
  2. Step 2: Convert to fraction form
    1,986.24/2,741.62 = 1,239.74/x
  3. Step 3: Cross multiply
    1,986.24x = 2,741.62 × 1,239.74
  4. Step 4: Simplify right side
    1,986.24x = 3,398,895.98
  5. Step 5: Solve for x
    x = 3,398,895.98/1,986.24
  6. Step 6: Final answer
    x = 1,711.22

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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.