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Finding the Third Proportional to 439.70 and 929.85

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Solution

The third proportional to 439.70 and 929.85 is: 1,966.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.70 : 929.85 = 929.85 : x
  2. Step 2: Convert to fraction form
    439.70/929.85 = 929.85/x
  3. Step 3: Cross multiply
    439.70x = 929.85 × 929.85
  4. Step 4: Simplify right side
    439.70x = 864,618.71
  5. Step 5: Solve for x
    x = 864,618.71/439.70
  6. Step 6: Final answer
    x = 1,966.40

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.