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Finding the Fourth Proportional to 247.66, 342.64 and 238.66

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Solution

The fourth proportional to 247.66, 342.64 and 238.66 is: 330.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.66 : 342.64 = 238.66 : x
  2. Step 2: Convert to fraction form
    247.66/342.64 = 238.66/x
  3. Step 3: Cross multiply
    247.66x = 342.64 × 238.66
  4. Step 4: Simplify right side
    247.66x = 81,774.46
  5. Step 5: Solve for x
    x = 81,774.46/247.66
  6. Step 6: Final answer
    x = 330.19

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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.