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Finding the Third Proportional to 285,850 and 420,211.50

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Solution

The third proportional to 285,850 and 420,211.50 is: 617,728.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,850 : 420,211.50 = 420,211.50 : x
  2. Step 2: Convert to fraction form
    285,850/420,211.50 = 420,211.50/x
  3. Step 3: Cross multiply
    285,850x = 420,211.50 × 420,211.50
  4. Step 4: Simplify right side
    285,850x = 176,577,704,732.25
  5. Step 5: Solve for x
    x = 176,577,704,732.25/285,850
  6. Step 6: Final answer
    x = 617,728.55

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.