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Finding the Fourth Proportional to 212.53, 318.86 and 151.48

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Solution

The fourth proportional to 212.53, 318.86 and 151.48 is: 227.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.53 : 318.86 = 151.48 : x
  2. Step 2: Convert to fraction form
    212.53/318.86 = 151.48/x
  3. Step 3: Cross multiply
    212.53x = 318.86 × 151.48
  4. Step 4: Simplify right side
    212.53x = 48,300.91
  5. Step 5: Solve for x
    x = 48,300.91/212.53
  6. Step 6: Final answer
    x = 227.27

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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.