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Finding the Fourth Proportional to 2,178.97, 2,999.64 and 1,957.84

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Solution

The fourth proportional to 2,178.97, 2,999.64 and 1,957.84 is: 2,695.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.97 : 2,999.64 = 1,957.84 : x
  2. Step 2: Convert to fraction form
    2,178.97/2,999.64 = 1,957.84/x
  3. Step 3: Cross multiply
    2,178.97x = 2,999.64 × 1,957.84
  4. Step 4: Simplify right side
    2,178.97x = 5,872,815.18
  5. Step 5: Solve for x
    x = 5,872,815.18/2,178.97
  6. Step 6: Final answer
    x = 2,695.23

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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.