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Finding the Fourth Proportional to 881.91, 1,216.94 and 571.41

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Solution

The fourth proportional to 881.91, 1,216.94 and 571.41 is: 788.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.91 : 1,216.94 = 571.41 : x
  2. Step 2: Convert to fraction form
    881.91/1,216.94 = 571.41/x
  3. Step 3: Cross multiply
    881.91x = 1,216.94 × 571.41
  4. Step 4: Simplify right side
    881.91x = 695,371.69
  5. Step 5: Solve for x
    x = 695,371.69/881.91
  6. Step 6: Final answer
    x = 788.48

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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.