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Finding the Fourth Proportional to 185.85, 255.92 and 153.05

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Solution

The fourth proportional to 185.85, 255.92 and 153.05 is: 210.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.85 : 255.92 = 153.05 : x
  2. Step 2: Convert to fraction form
    185.85/255.92 = 153.05/x
  3. Step 3: Cross multiply
    185.85x = 255.92 × 153.05
  4. Step 4: Simplify right side
    185.85x = 39,166.51
  5. Step 5: Solve for x
    x = 39,166.51/185.85
  6. Step 6: Final answer
    x = 210.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.