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Finding the Third Proportional to 390.38 and 584.44

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Solution

The third proportional to 390.38 and 584.44 is: 874.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    390.38 : 584.44 = 584.44 : x
  2. Step 2: Convert to fraction form
    390.38/584.44 = 584.44/x
  3. Step 3: Cross multiply
    390.38x = 584.44 × 584.44
  4. Step 4: Simplify right side
    390.38x = 341,567.19
  5. Step 5: Solve for x
    x = 341,567.19/390.38
  6. Step 6: Final answer
    x = 874.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.