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Finding the Third Proportional to 212,436 and 288,657

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Solution

The third proportional to 212,436 and 288,657 is: 392,225.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,436 : 288,657 = 288,657 : x
  2. Step 2: Convert to fraction form
    212,436/288,657 = 288,657/x
  3. Step 3: Cross multiply
    212,436x = 288,657 × 288,657
  4. Step 4: Simplify right side
    212,436x = 83,322,863,649
  5. Step 5: Solve for x
    x = 83,322,863,649/212,436
  6. Step 6: Final answer
    x = 392,225.72

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.