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Finding the Fourth Proportional to 881.63, 1,215.39 and 632.87

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Solution

The fourth proportional to 881.63, 1,215.39 and 632.87 is: 872.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.63 : 1,215.39 = 632.87 : x
  2. Step 2: Convert to fraction form
    881.63/1,215.39 = 632.87/x
  3. Step 3: Cross multiply
    881.63x = 1,215.39 × 632.87
  4. Step 4: Simplify right side
    881.63x = 769,183.87
  5. Step 5: Solve for x
    x = 769,183.87/881.63
  6. Step 6: Final answer
    x = 872.46

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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.