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Finding the Third Proportional to 3,420.50 and 5,358

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Solution

The third proportional to 3,420.50 and 5,358 is: 8,392.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,420.50 : 5,358 = 5,358 : x
  2. Step 2: Convert to fraction form
    3,420.50/5,358 = 5,358/x
  3. Step 3: Cross multiply
    3,420.50x = 5,358 × 5,358
  4. Step 4: Simplify right side
    3,420.50x = 28,708,164
  5. Step 5: Solve for x
    x = 28,708,164/3,420.50
  6. Step 6: Final answer
    x = 8,392.97

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.