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Finding the Fourth Proportional to 213.34, 320.02 and 76.38

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Solution

The fourth proportional to 213.34, 320.02 and 76.38 is: 114.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    213.34 : 320.02 = 76.38 : x
  2. Step 2: Convert to fraction form
    213.34/320.02 = 76.38/x
  3. Step 3: Cross multiply
    213.34x = 320.02 × 76.38
  4. Step 4: Simplify right side
    213.34x = 24,443.13
  5. Step 5: Solve for x
    x = 24,443.13/213.34
  6. Step 6: Final answer
    x = 114.57

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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.