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Finding the Fourth Proportional to 2,171.07, 3,256.35 and 611.19

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Solution

The fourth proportional to 2,171.07, 3,256.35 and 611.19 is: 916.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,171.07 : 3,256.35 = 611.19 : x
  2. Step 2: Convert to fraction form
    2,171.07/3,256.35 = 611.19/x
  3. Step 3: Cross multiply
    2,171.07x = 3,256.35 × 611.19
  4. Step 4: Simplify right side
    2,171.07x = 1,990,248.56
  5. Step 5: Solve for x
    x = 1,990,248.56/2,171.07
  6. Step 6: Final answer
    x = 916.71

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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.