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Finding the Third Proportional to 358.50 and 775.50

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Solution

The third proportional to 358.50 and 775.50 is: 1,677.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.50 : 775.50 = 775.50 : x
  2. Step 2: Convert to fraction form
    358.50/775.50 = 775.50/x
  3. Step 3: Cross multiply
    358.50x = 775.50 × 775.50
  4. Step 4: Simplify right side
    358.50x = 601,400.25
  5. Step 5: Solve for x
    x = 601,400.25/358.50
  6. Step 6: Final answer
    x = 1,677.55

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.