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Finding the Third Proportional to 432,310 and 690,625

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Solution

The third proportional to 432,310 and 690,625 is: 1,103,289.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    432,310 : 690,625 = 690,625 : x
  2. Step 2: Convert to fraction form
    432,310/690,625 = 690,625/x
  3. Step 3: Cross multiply
    432,310x = 690,625 × 690,625
  4. Step 4: Simplify right side
    432,310x = 476,962,890,625
  5. Step 5: Solve for x
    x = 476,962,890,625/432,310
  6. Step 6: Final answer
    x = 1,103,289.05

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.