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Finding the Fourth Proportional to 153.36, 231.16 and 144.08

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Solution

The fourth proportional to 153.36, 231.16 and 144.08 is: 217.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.36 : 231.16 = 144.08 : x
  2. Step 2: Convert to fraction form
    153.36/231.16 = 144.08/x
  3. Step 3: Cross multiply
    153.36x = 231.16 × 144.08
  4. Step 4: Simplify right side
    153.36x = 33,305.53
  5. Step 5: Solve for x
    x = 33,305.53/153.36
  6. Step 6: Final answer
    x = 217.17

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.