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Finding the Fourth Proportional to 453.98, 679.88 and 280.17

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Solution

The fourth proportional to 453.98, 679.88 and 280.17 is: 419.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.98 : 679.88 = 280.17 : x
  2. Step 2: Convert to fraction form
    453.98/679.88 = 280.17/x
  3. Step 3: Cross multiply
    453.98x = 679.88 × 280.17
  4. Step 4: Simplify right side
    453.98x = 190,480.58
  5. Step 5: Solve for x
    x = 190,480.58/453.98
  6. Step 6: Final answer
    x = 419.58

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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.