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Finding the Fourth Proportional to 212.96, 318.58 and 192.96

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Solution

The fourth proportional to 212.96, 318.58 and 192.96 is: 288.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.96 : 318.58 = 192.96 : x
  2. Step 2: Convert to fraction form
    212.96/318.58 = 192.96/x
  3. Step 3: Cross multiply
    212.96x = 318.58 × 192.96
  4. Step 4: Simplify right side
    212.96x = 61,473.20
  5. Step 5: Solve for x
    x = 61,473.20/212.96
  6. Step 6: Final answer
    x = 288.66

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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.