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Finding the Fourth Proportional to 212.94, 320.04 and 141.30

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Solution

The fourth proportional to 212.94, 320.04 and 141.30 is: 212.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.94 : 320.04 = 141.30 : x
  2. Step 2: Convert to fraction form
    212.94/320.04 = 141.30/x
  3. Step 3: Cross multiply
    212.94x = 320.04 × 141.30
  4. Step 4: Simplify right side
    212.94x = 45,221.65
  5. Step 5: Solve for x
    x = 45,221.65/212.94
  6. Step 6: Final answer
    x = 212.37

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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.