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Finding the Fourth Proportional to 212.67, 293.33 and 133.90

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Solution

The fourth proportional to 212.67, 293.33 and 133.90 is: 184.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.67 : 293.33 = 133.90 : x
  2. Step 2: Convert to fraction form
    212.67/293.33 = 133.90/x
  3. Step 3: Cross multiply
    212.67x = 293.33 × 133.90
  4. Step 4: Simplify right side
    212.67x = 39,276.49
  5. Step 5: Solve for x
    x = 39,276.49/212.67
  6. Step 6: Final answer
    x = 184.68

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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.