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Finding the Third Proportional to 321.09 and 435.94

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Solution

The third proportional to 321.09 and 435.94 is: 591.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.09 : 435.94 = 435.94 : x
  2. Step 2: Convert to fraction form
    321.09/435.94 = 435.94/x
  3. Step 3: Cross multiply
    321.09x = 435.94 × 435.94
  4. Step 4: Simplify right side
    321.09x = 190,041.50
  5. Step 5: Solve for x
    x = 190,041.50/321.09
  6. Step 6: Final answer
    x = 591.86

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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.