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Finding the Third Proportional to 369,217 and 553,209

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Solution

The third proportional to 369,217 and 553,209 is: 828,889.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    369,217 : 553,209 = 553,209 : x
  2. Step 2: Convert to fraction form
    369,217/553,209 = 553,209/x
  3. Step 3: Cross multiply
    369,217x = 553,209 × 553,209
  4. Step 4: Simplify right side
    369,217x = 306,040,197,681
  5. Step 5: Solve for x
    x = 306,040,197,681/369,217
  6. Step 6: Final answer
    x = 828,889.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.