Home / 2,079.31-2,869.81-1,240.07

Finding the Fourth Proportional to 2,079.31, 2,869.81 and 1,240.07

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Solution

The fourth proportional to 2,079.31, 2,869.81 and 1,240.07 is: 1,711.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,079.31 : 2,869.81 = 1,240.07 : x
  2. Step 2: Convert to fraction form
    2,079.31/2,869.81 = 1,240.07/x
  3. Step 3: Cross multiply
    2,079.31x = 2,869.81 × 1,240.07
  4. Step 4: Simplify right side
    2,079.31x = 3,558,747.84
  5. Step 5: Solve for x
    x = 3,558,747.84/2,079.31
  6. Step 6: Final answer
    x = 1,711.51

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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.