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Finding the Third Proportional to 278.44 and 432.89

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Solution

The third proportional to 278.44 and 432.89 is: 673.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.44 : 432.89 = 432.89 : x
  2. Step 2: Convert to fraction form
    278.44/432.89 = 432.89/x
  3. Step 3: Cross multiply
    278.44x = 432.89 × 432.89
  4. Step 4: Simplify right side
    278.44x = 187,394.29
  5. Step 5: Solve for x
    x = 187,394.29/278.44
  6. Step 6: Final answer
    x = 673.02

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.