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Finding the Fourth Proportional to 667.95, 1,001.44 and 355.39

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Solution

The fourth proportional to 667.95, 1,001.44 and 355.39 is: 532.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.95 : 1,001.44 = 355.39 : x
  2. Step 2: Convert to fraction form
    667.95/1,001.44 = 355.39/x
  3. Step 3: Cross multiply
    667.95x = 1,001.44 × 355.39
  4. Step 4: Simplify right side
    667.95x = 355,898.70
  5. Step 5: Solve for x
    x = 355,898.70/667.95
  6. Step 6: Final answer
    x = 532.83

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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.