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Finding the Fourth Proportional to 153.96, 213.48 and 151.44

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Solution

The fourth proportional to 153.96, 213.48 and 151.44 is: 209.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.96 : 213.48 = 151.44 : x
  2. Step 2: Convert to fraction form
    153.96/213.48 = 151.44/x
  3. Step 3: Cross multiply
    153.96x = 213.48 × 151.44
  4. Step 4: Simplify right side
    153.96x = 32,329.41
  5. Step 5: Solve for x
    x = 32,329.41/153.96
  6. Step 6: Final answer
    x = 209.99

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.