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Finding the Fourth Proportional to 869.71, 1,199.56 and 633.73

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Solution

The fourth proportional to 869.71, 1,199.56 and 633.73 is: 874.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    869.71 : 1,199.56 = 633.73 : x
  2. Step 2: Convert to fraction form
    869.71/1,199.56 = 633.73/x
  3. Step 3: Cross multiply
    869.71x = 1,199.56 × 633.73
  4. Step 4: Simplify right side
    869.71x = 760,187.99
  5. Step 5: Solve for x
    x = 760,187.99/869.71
  6. Step 6: Final answer
    x = 874.08

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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.