Home / 1,531.13-2,112.93-867.95

Finding the Fourth Proportional to 1,531.13, 2,112.93 and 867.95

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Solution

The fourth proportional to 1,531.13, 2,112.93 and 867.95 is: 1,197.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,531.13 : 2,112.93 = 867.95 : x
  2. Step 2: Convert to fraction form
    1,531.13/2,112.93 = 867.95/x
  3. Step 3: Cross multiply
    1,531.13x = 2,112.93 × 867.95
  4. Step 4: Simplify right side
    1,531.13x = 1,833,917.59
  5. Step 5: Solve for x
    x = 1,833,917.59/1,531.13
  6. Step 6: Final answer
    x = 1,197.75

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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.