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Finding the Third Proportional to 285,912 and 420,552

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Solution

The third proportional to 285,912 and 420,552 is: 618,595.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,912 : 420,552 = 420,552 : x
  2. Step 2: Convert to fraction form
    285,912/420,552 = 420,552/x
  3. Step 3: Cross multiply
    285,912x = 420,552 × 420,552
  4. Step 4: Simplify right side
    285,912x = 176,863,984,704
  5. Step 5: Solve for x
    x = 176,863,984,704/285,912
  6. Step 6: Final answer
    x = 618,595.88

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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.