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Finding the Third Proportional to 478,890 and 697,275

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Solution

The third proportional to 478,890 and 697,275 is: 1,015,248.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,890 : 697,275 = 697,275 : x
  2. Step 2: Convert to fraction form
    478,890/697,275 = 697,275/x
  3. Step 3: Cross multiply
    478,890x = 697,275 × 697,275
  4. Step 4: Simplify right side
    478,890x = 486,192,425,625
  5. Step 5: Solve for x
    x = 486,192,425,625/478,890
  6. Step 6: Final answer
    x = 1,015,248.65

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.