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Finding the Fourth Proportional to 153.24, 212.75 and 148.79

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Solution

The fourth proportional to 153.24, 212.75 and 148.79 is: 206.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.24 : 212.75 = 148.79 : x
  2. Step 2: Convert to fraction form
    153.24/212.75 = 148.79/x
  3. Step 3: Cross multiply
    153.24x = 212.75 × 148.79
  4. Step 4: Simplify right side
    153.24x = 31,653.26
  5. Step 5: Solve for x
    x = 31,653.26/153.24
  6. Step 6: Final answer
    x = 206.56

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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.