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Finding the Fourth Proportional to 446.78, 616.54 and 281.08

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Solution

The fourth proportional to 446.78, 616.54 and 281.08 is: 387.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    446.78 : 616.54 = 281.08 : x
  2. Step 2: Convert to fraction form
    446.78/616.54 = 281.08/x
  3. Step 3: Cross multiply
    446.78x = 616.54 × 281.08
  4. Step 4: Simplify right side
    446.78x = 173,297.06
  5. Step 5: Solve for x
    x = 173,297.06/446.78
  6. Step 6: Final answer
    x = 387.88

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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.