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Finding the Third Proportional to 358,780 and 555,666

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Solution

The third proportional to 358,780 and 555,666 is: 860,596.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,780 : 555,666 = 555,666 : x
  2. Step 2: Convert to fraction form
    358,780/555,666 = 555,666/x
  3. Step 3: Cross multiply
    358,780x = 555,666 × 555,666
  4. Step 4: Simplify right side
    358,780x = 308,764,703,556
  5. Step 5: Solve for x
    x = 308,764,703,556/358,780
  6. Step 6: Final answer
    x = 860,596.20

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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.