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Finding the Fourth Proportional to 969.37, 1,336.90 and 654.55

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Solution

The fourth proportional to 969.37, 1,336.90 and 654.55 is: 902.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    969.37 : 1,336.90 = 654.55 : x
  2. Step 2: Convert to fraction form
    969.37/1,336.90 = 654.55/x
  3. Step 3: Cross multiply
    969.37x = 1,336.90 × 654.55
  4. Step 4: Simplify right side
    969.37x = 875,057.94
  5. Step 5: Solve for x
    x = 875,057.94/969.37
  6. Step 6: Final answer
    x = 902.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.