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Finding the Fourth Proportional to 969.46, 1,338.33 and 674.98

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Solution

The fourth proportional to 969.46, 1,338.33 and 674.98 is: 931.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    969.46 : 1,338.33 = 674.98 : x
  2. Step 2: Convert to fraction form
    969.46/1,338.33 = 674.98/x
  3. Step 3: Cross multiply
    969.46x = 1,338.33 × 674.98
  4. Step 4: Simplify right side
    969.46x = 903,345.98
  5. Step 5: Solve for x
    x = 903,345.98/969.46
  6. Step 6: Final answer
    x = 931.80

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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.