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Finding the Fourth Proportional to 2,696.66, 3,721.44 and 1,578.40

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Solution

The fourth proportional to 2,696.66, 3,721.44 and 1,578.40 is: 2,178.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,696.66 : 3,721.44 = 1,578.40 : x
  2. Step 2: Convert to fraction form
    2,696.66/3,721.44 = 1,578.40/x
  3. Step 3: Cross multiply
    2,696.66x = 3,721.44 × 1,578.40
  4. Step 4: Simplify right side
    2,696.66x = 5,873,920.90
  5. Step 5: Solve for x
    x = 5,873,920.90/2,696.66
  6. Step 6: Final answer
    x = 2,178.22

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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.