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Finding the Fourth Proportional to 994.99, 1,371.82 and 817.30

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Solution

The fourth proportional to 994.99, 1,371.82 and 817.30 is: 1,126.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.99 : 1,371.82 = 817.30 : x
  2. Step 2: Convert to fraction form
    994.99/1,371.82 = 817.30/x
  3. Step 3: Cross multiply
    994.99x = 1,371.82 × 817.30
  4. Step 4: Simplify right side
    994.99x = 1,121,188.49
  5. Step 5: Solve for x
    x = 1,121,188.49/994.99
  6. Step 6: Final answer
    x = 1,126.83

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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.