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Finding the Fourth Proportional to 418.84, 627.95 and 281.54

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Solution

The fourth proportional to 418.84, 627.95 and 281.54 is: 422.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.84 : 627.95 = 281.54 : x
  2. Step 2: Convert to fraction form
    418.84/627.95 = 281.54/x
  3. Step 3: Cross multiply
    418.84x = 627.95 × 281.54
  4. Step 4: Simplify right side
    418.84x = 176,795.32
  5. Step 5: Solve for x
    x = 176,795.32/418.84
  6. Step 6: Final answer
    x = 422.11

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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.