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Finding the Fourth Proportional to 667.09, 999.08 and 644.02

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Solution

The fourth proportional to 667.09, 999.08 and 644.02 is: 964.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.09 : 999.08 = 644.02 : x
  2. Step 2: Convert to fraction form
    667.09/999.08 = 644.02/x
  3. Step 3: Cross multiply
    667.09x = 999.08 × 644.02
  4. Step 4: Simplify right side
    667.09x = 643,427.50
  5. Step 5: Solve for x
    x = 643,427.50/667.09
  6. Step 6: Final answer
    x = 964.53

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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.