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Finding the Fourth Proportional to 645.92, 969.57 and 372.55

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Solution

The fourth proportional to 645.92, 969.57 and 372.55 is: 559.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.92 : 969.57 = 372.55 : x
  2. Step 2: Convert to fraction form
    645.92/969.57 = 372.55/x
  3. Step 3: Cross multiply
    645.92x = 969.57 × 372.55
  4. Step 4: Simplify right side
    645.92x = 361,212.70
  5. Step 5: Solve for x
    x = 361,212.70/645.92
  6. Step 6: Final answer
    x = 559.22

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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.