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Finding the Fourth Proportional to 247.40, 371.40 and 186.06

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Solution

The fourth proportional to 247.40, 371.40 and 186.06 is: 279.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.40 : 371.40 = 186.06 : x
  2. Step 2: Convert to fraction form
    247.40/371.40 = 186.06/x
  3. Step 3: Cross multiply
    247.40x = 371.40 × 186.06
  4. Step 4: Simplify right side
    247.40x = 69,102.68
  5. Step 5: Solve for x
    x = 69,102.68/247.40
  6. Step 6: Final answer
    x = 279.32

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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.