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Finding the Fourth Proportional to 212.93, 319.49 and 97.30

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Solution

The fourth proportional to 212.93, 319.49 and 97.30 is: 145.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.93 : 319.49 = 97.30 : x
  2. Step 2: Convert to fraction form
    212.93/319.49 = 97.30/x
  3. Step 3: Cross multiply
    212.93x = 319.49 × 97.30
  4. Step 4: Simplify right side
    212.93x = 31,086.38
  5. Step 5: Solve for x
    x = 31,086.38/212.93
  6. Step 6: Final answer
    x = 145.99

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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.