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Finding the Fourth Proportional to 969.48, 1,336.64 and 576.36

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Solution

The fourth proportional to 969.48, 1,336.64 and 576.36 is: 794.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    969.48 : 1,336.64 = 576.36 : x
  2. Step 2: Convert to fraction form
    969.48/1,336.64 = 576.36/x
  3. Step 3: Cross multiply
    969.48x = 1,336.64 × 576.36
  4. Step 4: Simplify right side
    969.48x = 770,385.83
  5. Step 5: Solve for x
    x = 770,385.83/969.48
  6. Step 6: Final answer
    x = 794.64

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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.