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Finding the Third Proportional to 279.75 and 432.94

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Solution

The third proportional to 279.75 and 432.94 is: 670.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.75 : 432.94 = 432.94 : x
  2. Step 2: Convert to fraction form
    279.75/432.94 = 432.94/x
  3. Step 3: Cross multiply
    279.75x = 432.94 × 432.94
  4. Step 4: Simplify right side
    279.75x = 187,434.88
  5. Step 5: Solve for x
    x = 187,434.88/279.75
  6. Step 6: Final answer
    x = 670.01

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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.