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Finding the Fourth Proportional to 645.03, 966.81 and 280.02

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Solution

The fourth proportional to 645.03, 966.81 and 280.02 is: 419.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.03 : 966.81 = 280.02 : x
  2. Step 2: Convert to fraction form
    645.03/966.81 = 280.02/x
  3. Step 3: Cross multiply
    645.03x = 966.81 × 280.02
  4. Step 4: Simplify right side
    645.03x = 270,726.14
  5. Step 5: Solve for x
    x = 270,726.14/645.03
  6. Step 6: Final answer
    x = 419.71

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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.