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Finding the Third Proportional to 285,804 and 420,156

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Solution

The third proportional to 285,804 and 420,156 is: 617,664.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,804 : 420,156 = 420,156 : x
  2. Step 2: Convert to fraction form
    285,804/420,156 = 420,156/x
  3. Step 3: Cross multiply
    285,804x = 420,156 × 420,156
  4. Step 4: Simplify right side
    285,804x = 176,531,064,336
  5. Step 5: Solve for x
    x = 176,531,064,336/285,804
  6. Step 6: Final answer
    x = 617,664.78

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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.