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Finding the Third Proportional to 287,780 and 586,980

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Solution

The third proportional to 287,780 and 586,980 is: 1,197,253.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,780 : 586,980 = 586,980 : x
  2. Step 2: Convert to fraction form
    287,780/586,980 = 586,980/x
  3. Step 3: Cross multiply
    287,780x = 586,980 × 586,980
  4. Step 4: Simplify right side
    287,780x = 344,545,520,400
  5. Step 5: Solve for x
    x = 344,545,520,400/287,780
  6. Step 6: Final answer
    x = 1,197,253.18

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Why These Related Problems?

These problems maintain the same ratio (2.04) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.