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Finding the Fourth Proportional to 2,725.74, 4,079.30 and 1,685.30

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Solution

The fourth proportional to 2,725.74, 4,079.30 and 1,685.30 is: 2,522.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,725.74 : 4,079.30 = 1,685.30 : x
  2. Step 2: Convert to fraction form
    2,725.74/4,079.30 = 1,685.30/x
  3. Step 3: Cross multiply
    2,725.74x = 4,079.30 × 1,685.30
  4. Step 4: Simplify right side
    2,725.74x = 6,874,815.47
  5. Step 5: Solve for x
    x = 6,874,815.47/2,725.74
  6. Step 6: Final answer
    x = 2,522.18

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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.