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Finding the Fourth Proportional to 153.14, 209.52 and 152.49

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Solution

The fourth proportional to 153.14, 209.52 and 152.49 is: 208.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.14 : 209.52 = 152.49 : x
  2. Step 2: Convert to fraction form
    153.14/209.52 = 152.49/x
  3. Step 3: Cross multiply
    153.14x = 209.52 × 152.49
  4. Step 4: Simplify right side
    153.14x = 31,949.90
  5. Step 5: Solve for x
    x = 31,949.90/153.14
  6. Step 6: Final answer
    x = 208.64

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.