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Finding the Fourth Proportional to 969.60, 1,338.27 and 576.84

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Solution

The fourth proportional to 969.60, 1,338.27 and 576.84 is: 796.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    969.60 : 1,338.27 = 576.84 : x
  2. Step 2: Convert to fraction form
    969.60/1,338.27 = 576.84/x
  3. Step 3: Cross multiply
    969.60x = 1,338.27 × 576.84
  4. Step 4: Simplify right side
    969.60x = 771,967.67
  5. Step 5: Solve for x
    x = 771,967.67/969.60
  6. Step 6: Final answer
    x = 796.17

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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.