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Finding the Fourth Proportional to 869.49, 1,198.76 and 633.49

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Solution

The fourth proportional to 869.49, 1,198.76 and 633.49 is: 873.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    869.49 : 1,198.76 = 633.49 : x
  2. Step 2: Convert to fraction form
    869.49/1,198.76 = 633.49/x
  3. Step 3: Cross multiply
    869.49x = 1,198.76 × 633.49
  4. Step 4: Simplify right side
    869.49x = 759,396.31
  5. Step 5: Solve for x
    x = 759,396.31/869.49
  6. Step 6: Final answer
    x = 873.38

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Double scale
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1.5x scale

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.