Home / 1,976.19-2,726.30-1,387.11

Finding the Fourth Proportional to 1,976.19, 2,726.30 and 1,387.11

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Solution

The fourth proportional to 1,976.19, 2,726.30 and 1,387.11 is: 1,913.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,976.19 : 2,726.30 = 1,387.11 : x
  2. Step 2: Convert to fraction form
    1,976.19/2,726.30 = 1,387.11/x
  3. Step 3: Cross multiply
    1,976.19x = 2,726.30 × 1,387.11
  4. Step 4: Simplify right side
    1,976.19x = 3,781,671.06
  5. Step 5: Solve for x
    x = 3,781,671.06/1,976.19
  6. Step 6: Final answer
    x = 1,913.62

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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.