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Finding the Third Proportional to 439 and 585.50

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Solution

The third proportional to 439 and 585.50 is: 780.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    439 : 585.50 = 585.50 : x
  2. Step 2: Convert to fraction form
    439/585.50 = 585.50/x
  3. Step 3: Cross multiply
    439x = 585.50 × 585.50
  4. Step 4: Simplify right side
    439x = 342,810.25
  5. Step 5: Solve for x
    x = 342,810.25/439
  6. Step 6: Final answer
    x = 780.89

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.