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Finding the Fourth Proportional to 645.10, 965.58 and 450.34

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Solution

The fourth proportional to 645.10, 965.58 and 450.34 is: 674.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.10 : 965.58 = 450.34 : x
  2. Step 2: Convert to fraction form
    645.10/965.58 = 450.34/x
  3. Step 3: Cross multiply
    645.10x = 965.58 × 450.34
  4. Step 4: Simplify right side
    645.10x = 434,839.30
  5. Step 5: Solve for x
    x = 434,839.30/645.10
  6. Step 6: Final answer
    x = 674.06

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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.