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Finding the Fourth Proportional to 638.11, 880.14 and 448.75

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Solution

The fourth proportional to 638.11, 880.14 and 448.75 is: 618.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.11 : 880.14 = 448.75 : x
  2. Step 2: Convert to fraction form
    638.11/880.14 = 448.75/x
  3. Step 3: Cross multiply
    638.11x = 880.14 × 448.75
  4. Step 4: Simplify right side
    638.11x = 394,962.83
  5. Step 5: Solve for x
    x = 394,962.83/638.11
  6. Step 6: Final answer
    x = 618.96

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Double scale
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1.5x scale

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.