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Finding the Fourth Proportional to 247.77, 341.94 and 149.55

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Solution

The fourth proportional to 247.77, 341.94 and 149.55 is: 206.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.77 : 341.94 = 149.55 : x
  2. Step 2: Convert to fraction form
    247.77/341.94 = 149.55/x
  3. Step 3: Cross multiply
    247.77x = 341.94 × 149.55
  4. Step 4: Simplify right side
    247.77x = 51,137.13
  5. Step 5: Solve for x
    x = 51,137.13/247.77
  6. Step 6: Final answer
    x = 206.39

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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.