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Finding the Fourth Proportional to 969.77, 1,338.45 and 576.92

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Solution

The fourth proportional to 969.77, 1,338.45 and 576.92 is: 796.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    969.77 : 1,338.45 = 576.92 : x
  2. Step 2: Convert to fraction form
    969.77/1,338.45 = 576.92/x
  3. Step 3: Cross multiply
    969.77x = 1,338.45 × 576.92
  4. Step 4: Simplify right side
    969.77x = 772,178.57
  5. Step 5: Solve for x
    x = 772,178.57/969.77
  6. Step 6: Final answer
    x = 796.25

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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.