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Finding the Fourth Proportional to 881.83, 1,216.95 and 488.89

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Solution

The fourth proportional to 881.83, 1,216.95 and 488.89 is: 674.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.83 : 1,216.95 = 488.89 : x
  2. Step 2: Convert to fraction form
    881.83/1,216.95 = 488.89/x
  3. Step 3: Cross multiply
    881.83x = 1,216.95 × 488.89
  4. Step 4: Simplify right side
    881.83x = 594,954.69
  5. Step 5: Solve for x
    x = 594,954.69/881.83
  6. Step 6: Final answer
    x = 674.68

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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.