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Finding the Fourth Proportional to 638.10, 880.93 and 439.05

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Solution

The fourth proportional to 638.10, 880.93 and 439.05 is: 606.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.10 : 880.93 = 439.05 : x
  2. Step 2: Convert to fraction form
    638.10/880.93 = 439.05/x
  3. Step 3: Cross multiply
    638.10x = 880.93 × 439.05
  4. Step 4: Simplify right side
    638.10x = 386,766.27
  5. Step 5: Solve for x
    x = 386,766.27/638.10
  6. Step 6: Final answer
    x = 606.12

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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.