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Finding the Fourth Proportional to 1,541.58, 2,127.22 and 878.41

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Solution

The fourth proportional to 1,541.58, 2,127.22 and 878.41 is: 1,212.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,541.58 : 2,127.22 = 878.41 : x
  2. Step 2: Convert to fraction form
    1,541.58/2,127.22 = 878.41/x
  3. Step 3: Cross multiply
    1,541.58x = 2,127.22 × 878.41
  4. Step 4: Simplify right side
    1,541.58x = 1,868,571.32
  5. Step 5: Solve for x
    x = 1,868,571.32/1,541.58
  6. Step 6: Final answer
    x = 1,212.11

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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.