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Finding the Fourth Proportional to 638.11, 880.37 and 417.19

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Solution

The fourth proportional to 638.11, 880.37 and 417.19 is: 575.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.11 : 880.37 = 417.19 : x
  2. Step 2: Convert to fraction form
    638.11/880.37 = 417.19/x
  3. Step 3: Cross multiply
    638.11x = 880.37 × 417.19
  4. Step 4: Simplify right side
    638.11x = 367,282.14
  5. Step 5: Solve for x
    x = 367,282.14/638.11
  6. Step 6: Final answer
    x = 575.58

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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.