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Finding the Fourth Proportional to 372.28, 558.14 and 215.89

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Solution

The fourth proportional to 372.28, 558.14 and 215.89 is: 323.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.28 : 558.14 = 215.89 : x
  2. Step 2: Convert to fraction form
    372.28/558.14 = 215.89/x
  3. Step 3: Cross multiply
    372.28x = 558.14 × 215.89
  4. Step 4: Simplify right side
    372.28x = 120,494.05
  5. Step 5: Solve for x
    x = 120,494.05/372.28
  6. Step 6: Final answer
    x = 323.67

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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.