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Finding the Third Proportional to 358,780 and 555,210

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Solution

The third proportional to 358,780 and 555,210 is: 859,184.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,780 : 555,210 = 555,210 : x
  2. Step 2: Convert to fraction form
    358,780/555,210 = 555,210/x
  3. Step 3: Cross multiply
    358,780x = 555,210 × 555,210
  4. Step 4: Simplify right side
    358,780x = 308,258,144,100
  5. Step 5: Solve for x
    x = 308,258,144,100/358,780
  6. Step 6: Final answer
    x = 859,184.30

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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.