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Finding the Fourth Proportional to 2,250.16, 3,105 and 1,255.40

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Solution

The fourth proportional to 2,250.16, 3,105 and 1,255.40 is: 1,732.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,250.16 : 3,105 = 1,255.40 : x
  2. Step 2: Convert to fraction form
    2,250.16/3,105 = 1,255.40/x
  3. Step 3: Cross multiply
    2,250.16x = 3,105 × 1,255.40
  4. Step 4: Simplify right side
    2,250.16x = 3,898,017.00
  5. Step 5: Solve for x
    x = 3,898,017.00/2,250.16
  6. Step 6: Final answer
    x = 1,732.33

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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.