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Finding the Third Proportional to 270.84 and 428.10

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Solution

The third proportional to 270.84 and 428.10 is: 676.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    270.84 : 428.10 = 428.10 : x
  2. Step 2: Convert to fraction form
    270.84/428.10 = 428.10/x
  3. Step 3: Cross multiply
    270.84x = 428.10 × 428.10
  4. Step 4: Simplify right side
    270.84x = 183,267.60
  5. Step 5: Solve for x
    x = 183,267.60/270.84
  6. Step 6: Final answer
    x = 676.65

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.