Home / 1,531.81-2,113.73-868.66

Finding the Fourth Proportional to 1,531.81, 2,113.73 and 868.66

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Solution

The fourth proportional to 1,531.81, 2,113.73 and 868.66 is: 1,198.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,531.81 : 2,113.73 = 868.66 : x
  2. Step 2: Convert to fraction form
    1,531.81/2,113.73 = 868.66/x
  3. Step 3: Cross multiply
    1,531.81x = 2,113.73 × 868.66
  4. Step 4: Simplify right side
    1,531.81x = 1,836,112.70
  5. Step 5: Solve for x
    x = 1,836,112.70/1,531.81
  6. Step 6: Final answer
    x = 1,198.66

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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.