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Finding the Fourth Proportional to 667.37, 918.98 and 634.57

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Solution

The fourth proportional to 667.37, 918.98 and 634.57 is: 873.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.37 : 918.98 = 634.57 : x
  2. Step 2: Convert to fraction form
    667.37/918.98 = 634.57/x
  3. Step 3: Cross multiply
    667.37x = 918.98 × 634.57
  4. Step 4: Simplify right side
    667.37x = 583,154.05
  5. Step 5: Solve for x
    x = 583,154.05/667.37
  6. Step 6: Final answer
    x = 873.81

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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.