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Finding the Third Proportional to 358,778 and 555,177

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Solution

The third proportional to 358,778 and 555,177 is: 859,086.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,778 : 555,177 = 555,177 : x
  2. Step 2: Convert to fraction form
    358,778/555,177 = 555,177/x
  3. Step 3: Cross multiply
    358,778x = 555,177 × 555,177
  4. Step 4: Simplify right side
    358,778x = 308,221,501,329
  5. Step 5: Solve for x
    x = 308,221,501,329/358,778
  6. Step 6: Final answer
    x = 859,086.96

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.