Home / 1,728.10-2,382.97-1,137.88

Finding the Fourth Proportional to 1,728.10, 2,382.97 and 1,137.88

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Solution

The fourth proportional to 1,728.10, 2,382.97 and 1,137.88 is: 1,569.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,728.10 : 2,382.97 = 1,137.88 : x
  2. Step 2: Convert to fraction form
    1,728.10/2,382.97 = 1,137.88/x
  3. Step 3: Cross multiply
    1,728.10x = 2,382.97 × 1,137.88
  4. Step 4: Simplify right side
    1,728.10x = 2,711,516.30
  5. Step 5: Solve for x
    x = 2,711,516.30/1,728.10
  6. Step 6: Final answer
    x = 1,569.08

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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.