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Finding the Fourth Proportional to 453.43, 680.17 and 279.99

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Solution

The fourth proportional to 453.43, 680.17 and 279.99 is: 419.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.43 : 680.17 = 279.99 : x
  2. Step 2: Convert to fraction form
    453.43/680.17 = 279.99/x
  3. Step 3: Cross multiply
    453.43x = 680.17 × 279.99
  4. Step 4: Simplify right side
    453.43x = 190,436.70
  5. Step 5: Solve for x
    x = 190,436.70/453.43
  6. Step 6: Final answer
    x = 419.99

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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.