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Finding the Third Proportional to 285,811.50 and 420,165

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Solution

The third proportional to 285,811.50 and 420,165 is: 617,675.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,811.50 : 420,165 = 420,165 : x
  2. Step 2: Convert to fraction form
    285,811.50/420,165 = 420,165/x
  3. Step 3: Cross multiply
    285,811.50x = 420,165 × 420,165
  4. Step 4: Simplify right side
    285,811.50x = 176,538,627,225
  5. Step 5: Solve for x
    x = 176,538,627,225/285,811.50
  6. Step 6: Final answer
    x = 617,675.03

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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.