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Finding the Fourth Proportional to 249.54, 373.31 and 215.67

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Solution

The fourth proportional to 249.54, 373.31 and 215.67 is: 322.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.54 : 373.31 = 215.67 : x
  2. Step 2: Convert to fraction form
    249.54/373.31 = 215.67/x
  3. Step 3: Cross multiply
    249.54x = 373.31 × 215.67
  4. Step 4: Simplify right side
    249.54x = 80,512.71
  5. Step 5: Solve for x
    x = 80,512.71/249.54
  6. Step 6: Final answer
    x = 322.64

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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.