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Finding the Fourth Proportional to 454.51, 627.09 and 279.85

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Solution

The fourth proportional to 454.51, 627.09 and 279.85 is: 386.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.51 : 627.09 = 279.85 : x
  2. Step 2: Convert to fraction form
    454.51/627.09 = 279.85/x
  3. Step 3: Cross multiply
    454.51x = 627.09 × 279.85
  4. Step 4: Simplify right side
    454.51x = 175,491.14
  5. Step 5: Solve for x
    x = 175,491.14/454.51
  6. Step 6: Final answer
    x = 386.11

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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.