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Finding the Fourth Proportional to 2,188.50, 3,282.42 and 727.47

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Solution

The fourth proportional to 2,188.50, 3,282.42 and 727.47 is: 1,091.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,188.50 : 3,282.42 = 727.47 : x
  2. Step 2: Convert to fraction form
    2,188.50/3,282.42 = 727.47/x
  3. Step 3: Cross multiply
    2,188.50x = 3,282.42 × 727.47
  4. Step 4: Simplify right side
    2,188.50x = 2,387,862.08
  5. Step 5: Solve for x
    x = 2,387,862.08/2,188.50
  6. Step 6: Final answer
    x = 1,091.10

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1.5x scale

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.