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Finding the Third Proportional to 155.18 and 247.01

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Solution

The third proportional to 155.18 and 247.01 is: 393.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.18 : 247.01 = 247.01 : x
  2. Step 2: Convert to fraction form
    155.18/247.01 = 247.01/x
  3. Step 3: Cross multiply
    155.18x = 247.01 × 247.01
  4. Step 4: Simplify right side
    155.18x = 61,012.86
  5. Step 5: Solve for x
    x = 61,012.86/155.18
  6. Step 6: Final answer
    x = 393.18

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.