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Finding the Third Proportional to 358.88 and 777.38

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Solution

The third proportional to 358.88 and 777.38 is: 1,683.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.88 : 777.38 = 777.38 : x
  2. Step 2: Convert to fraction form
    358.88/777.38 = 777.38/x
  3. Step 3: Cross multiply
    358.88x = 777.38 × 777.38
  4. Step 4: Simplify right side
    358.88x = 604,311.89
  5. Step 5: Solve for x
    x = 604,311.89/358.88
  6. Step 6: Final answer
    x = 1,683.91

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.