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Finding the Fourth Proportional to 2,371.97, 3,557.95 and 811.99

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Solution

The fourth proportional to 2,371.97, 3,557.95 and 811.99 is: 1,217.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,371.97 : 3,557.95 = 811.99 : x
  2. Step 2: Convert to fraction form
    2,371.97/3,557.95 = 811.99/x
  3. Step 3: Cross multiply
    2,371.97x = 3,557.95 × 811.99
  4. Step 4: Simplify right side
    2,371.97x = 2,889,022.24
  5. Step 5: Solve for x
    x = 2,889,022.24/2,371.97
  6. Step 6: Final answer
    x = 1,217.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.