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Finding the Third Proportional to 386 and 497.50

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Solution

The third proportional to 386 and 497.50 is: 641.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    386 : 497.50 = 497.50 : x
  2. Step 2: Convert to fraction form
    386/497.50 = 497.50/x
  3. Step 3: Cross multiply
    386x = 497.50 × 497.50
  4. Step 4: Simplify right side
    386x = 247,506.25
  5. Step 5: Solve for x
    x = 247,506.25/386
  6. Step 6: Final answer
    x = 641.21

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Why These Related Problems?

These problems maintain the same ratio (1.29) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.