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Finding the Fourth Proportional to 247.58, 369.18 and 213.56

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Solution

The fourth proportional to 247.58, 369.18 and 213.56 is: 318.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.58 : 369.18 = 213.56 : x
  2. Step 2: Convert to fraction form
    247.58/369.18 = 213.56/x
  3. Step 3: Cross multiply
    247.58x = 369.18 × 213.56
  4. Step 4: Simplify right side
    247.58x = 78,842.08
  5. Step 5: Solve for x
    x = 78,842.08/247.58
  6. Step 6: Final answer
    x = 318.45

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.