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Finding the Fourth Proportional to 969.02, 1,453.50 and 644.30

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Solution

The fourth proportional to 969.02, 1,453.50 and 644.30 is: 966.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    969.02 : 1,453.50 = 644.30 : x
  2. Step 2: Convert to fraction form
    969.02/1,453.50 = 644.30/x
  3. Step 3: Cross multiply
    969.02x = 1,453.50 × 644.30
  4. Step 4: Simplify right side
    969.02x = 936,490.05
  5. Step 5: Solve for x
    x = 936,490.05/969.02
  6. Step 6: Final answer
    x = 966.43

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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.