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Finding the Fourth Proportional to 2,255.70, 3,383.52 and 612.40

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Solution

The fourth proportional to 2,255.70, 3,383.52 and 612.40 is: 918.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,255.70 : 3,383.52 = 612.40 : x
  2. Step 2: Convert to fraction form
    2,255.70/3,383.52 = 612.40/x
  3. Step 3: Cross multiply
    2,255.70x = 3,383.52 × 612.40
  4. Step 4: Simplify right side
    2,255.70x = 2,072,067.65
  5. Step 5: Solve for x
    x = 2,072,067.65/2,255.70
  6. Step 6: Final answer
    x = 918.59

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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.