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Finding the Fourth Proportional to 667.05, 1,002.39 and 623.31

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Solution

The fourth proportional to 667.05, 1,002.39 and 623.31 is: 936.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.05 : 1,002.39 = 623.31 : x
  2. Step 2: Convert to fraction form
    667.05/1,002.39 = 623.31/x
  3. Step 3: Cross multiply
    667.05x = 1,002.39 × 623.31
  4. Step 4: Simplify right side
    667.05x = 624,799.71
  5. Step 5: Solve for x
    x = 624,799.71/667.05
  6. Step 6: Final answer
    x = 936.66

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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.