Home / 1,531.31-2,113.19-868.22

Finding the Fourth Proportional to 1,531.31, 2,113.19 and 868.22

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Solution

The fourth proportional to 1,531.31, 2,113.19 and 868.22 is: 1,198.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,531.31 : 2,113.19 = 868.22 : x
  2. Step 2: Convert to fraction form
    1,531.31/2,113.19 = 868.22/x
  3. Step 3: Cross multiply
    1,531.31x = 2,113.19 × 868.22
  4. Step 4: Simplify right side
    1,531.31x = 1,834,710.10
  5. Step 5: Solve for x
    x = 1,834,710.10/1,531.31
  6. Step 6: Final answer
    x = 1,198.13

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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.