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Finding the Third Proportional to 156.38 and 342.98

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Solution

The third proportional to 156.38 and 342.98 is: 752.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.38 : 342.98 = 342.98 : x
  2. Step 2: Convert to fraction form
    156.38/342.98 = 342.98/x
  3. Step 3: Cross multiply
    156.38x = 342.98 × 342.98
  4. Step 4: Simplify right side
    156.38x = 117,638.28
  5. Step 5: Solve for x
    x = 117,638.28/156.38
  6. Step 6: Final answer
    x = 752.28

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.