Home / 1,985.19-2,741.31-1,240.42

Finding the Fourth Proportional to 1,985.19, 2,741.31 and 1,240.42

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Solution

The fourth proportional to 1,985.19, 2,741.31 and 1,240.42 is: 1,712.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.19 : 2,741.31 = 1,240.42 : x
  2. Step 2: Convert to fraction form
    1,985.19/2,741.31 = 1,240.42/x
  3. Step 3: Cross multiply
    1,985.19x = 2,741.31 × 1,240.42
  4. Step 4: Simplify right side
    1,985.19x = 3,400,382.60
  5. Step 5: Solve for x
    x = 3,400,382.60/1,985.19
  6. Step 6: Final answer
    x = 1,712.87

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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.