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Finding the Third Proportional to 358,815 and 555,228

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Solution

The third proportional to 358,815 and 555,228 is: 859,156.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,815 : 555,228 = 555,228 : x
  2. Step 2: Convert to fraction form
    358,815/555,228 = 555,228/x
  3. Step 3: Cross multiply
    358,815x = 555,228 × 555,228
  4. Step 4: Simplify right side
    358,815x = 308,278,131,984
  5. Step 5: Solve for x
    x = 308,278,131,984/358,815
  6. Step 6: Final answer
    x = 859,156.20

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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.