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Finding the Fourth Proportional to 2,254.78, 3,382.15 and 611.48

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Solution

The fourth proportional to 2,254.78, 3,382.15 and 611.48 is: 917.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,254.78 : 3,382.15 = 611.48 : x
  2. Step 2: Convert to fraction form
    2,254.78/3,382.15 = 611.48/x
  3. Step 3: Cross multiply
    2,254.78x = 3,382.15 × 611.48
  4. Step 4: Simplify right side
    2,254.78x = 2,068,117.08
  5. Step 5: Solve for x
    x = 2,068,117.08/2,254.78
  6. Step 6: Final answer
    x = 917.21

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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.