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Finding the Fourth Proportional to 153.54, 210.66 and 149.94

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Solution

The fourth proportional to 153.54, 210.66 and 149.94 is: 205.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.54 : 210.66 = 149.94 : x
  2. Step 2: Convert to fraction form
    153.54/210.66 = 149.94/x
  3. Step 3: Cross multiply
    153.54x = 210.66 × 149.94
  4. Step 4: Simplify right side
    153.54x = 31,586.36
  5. Step 5: Solve for x
    x = 31,586.36/153.54
  6. Step 6: Final answer
    x = 205.72

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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.