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Finding the Fourth Proportional to 667.16, 1,000.75 and 342.33

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Solution

The fourth proportional to 667.16, 1,000.75 and 342.33 is: 513.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.16 : 1,000.75 = 342.33 : x
  2. Step 2: Convert to fraction form
    667.16/1,000.75 = 342.33/x
  3. Step 3: Cross multiply
    667.16x = 1,000.75 × 342.33
  4. Step 4: Simplify right side
    667.16x = 342,586.75
  5. Step 5: Solve for x
    x = 342,586.75/667.16
  6. Step 6: Final answer
    x = 513.50

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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.