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Finding the Fourth Proportional to 370.92, 511.80 and 215.76

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Solution

The fourth proportional to 370.92, 511.80 and 215.76 is: 297.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.92 : 511.80 = 215.76 : x
  2. Step 2: Convert to fraction form
    370.92/511.80 = 215.76/x
  3. Step 3: Cross multiply
    370.92x = 511.80 × 215.76
  4. Step 4: Simplify right side
    370.92x = 110,425.97
  5. Step 5: Solve for x
    x = 110,425.97/370.92
  6. Step 6: Final answer
    x = 297.71

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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.