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Finding the Third Proportional to 318,424 and 432,679

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Solution

The third proportional to 318,424 and 432,679 is: 587,930.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,424 : 432,679 = 432,679 : x
  2. Step 2: Convert to fraction form
    318,424/432,679 = 432,679/x
  3. Step 3: Cross multiply
    318,424x = 432,679 × 432,679
  4. Step 4: Simplify right side
    318,424x = 187,211,117,041
  5. Step 5: Solve for x
    x = 187,211,117,041/318,424
  6. Step 6: Final answer
    x = 587,930.30

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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.