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Finding the Fourth Proportional to 418.51, 627.49 and 282.43

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Solution

The fourth proportional to 418.51, 627.49 and 282.43 is: 423.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.51 : 627.49 = 282.43 : x
  2. Step 2: Convert to fraction form
    418.51/627.49 = 282.43/x
  3. Step 3: Cross multiply
    418.51x = 627.49 × 282.43
  4. Step 4: Simplify right side
    418.51x = 177,222.00
  5. Step 5: Solve for x
    x = 177,222.00/418.51
  6. Step 6: Final answer
    x = 423.46

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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.