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Finding the Fourth Proportional to 259.11, 389.07 and 247.57

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Solution

The fourth proportional to 259.11, 389.07 and 247.57 is: 371.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.11 : 389.07 = 247.57 : x
  2. Step 2: Convert to fraction form
    259.11/389.07 = 247.57/x
  3. Step 3: Cross multiply
    259.11x = 389.07 × 247.57
  4. Step 4: Simplify right side
    259.11x = 96,321.09
  5. Step 5: Solve for x
    x = 96,321.09/259.11
  6. Step 6: Final answer
    x = 371.74

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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.