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Finding the Fourth Proportional to 353.40, 487.88 and 266.44

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Solution

The fourth proportional to 353.40, 487.88 and 266.44 is: 367.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.40 : 487.88 = 266.44 : x
  2. Step 2: Convert to fraction form
    353.40/487.88 = 266.44/x
  3. Step 3: Cross multiply
    353.40x = 487.88 × 266.44
  4. Step 4: Simplify right side
    353.40x = 129,990.75
  5. Step 5: Solve for x
    x = 129,990.75/353.40
  6. Step 6: Final answer
    x = 367.83

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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.