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Finding the Fourth Proportional to 638.91, 881.84 and 377.07

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Solution

The fourth proportional to 638.91, 881.84 and 377.07 is: 520.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.91 : 881.84 = 377.07 : x
  2. Step 2: Convert to fraction form
    638.91/881.84 = 377.07/x
  3. Step 3: Cross multiply
    638.91x = 881.84 × 377.07
  4. Step 4: Simplify right side
    638.91x = 332,513.52
  5. Step 5: Solve for x
    x = 332,513.52/638.91
  6. Step 6: Final answer
    x = 520.44

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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.