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Finding the Fourth Proportional to 1,818.44, 2,726.20 and 722.51

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Solution

The fourth proportional to 1,818.44, 2,726.20 and 722.51 is: 1,083.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,818.44 : 2,726.20 = 722.51 : x
  2. Step 2: Convert to fraction form
    1,818.44/2,726.20 = 722.51/x
  3. Step 3: Cross multiply
    1,818.44x = 2,726.20 × 722.51
  4. Step 4: Simplify right side
    1,818.44x = 1,969,706.76
  5. Step 5: Solve for x
    x = 1,969,706.76/1,818.44
  6. Step 6: Final answer
    x = 1,083.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.