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Finding the Third Proportional to 401,940 and 553,680

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Solution

The third proportional to 401,940 and 553,680 is: 762,704.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,940 : 553,680 = 553,680 : x
  2. Step 2: Convert to fraction form
    401,940/553,680 = 553,680/x
  3. Step 3: Cross multiply
    401,940x = 553,680 × 553,680
  4. Step 4: Simplify right side
    401,940x = 306,561,542,400
  5. Step 5: Solve for x
    x = 306,561,542,400/401,940
  6. Step 6: Final answer
    x = 762,704.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.