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Finding the Fourth Proportional to 418.06, 627.65 and 261.46

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Solution

The fourth proportional to 418.06, 627.65 and 261.46 is: 392.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.06 : 627.65 = 261.46 : x
  2. Step 2: Convert to fraction form
    418.06/627.65 = 261.46/x
  3. Step 3: Cross multiply
    418.06x = 627.65 × 261.46
  4. Step 4: Simplify right side
    418.06x = 164,105.37
  5. Step 5: Solve for x
    x = 164,105.37/418.06
  6. Step 6: Final answer
    x = 392.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.