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Finding the Fourth Proportional to 173.86, 239.37 and 156.28

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Solution

The fourth proportional to 173.86, 239.37 and 156.28 is: 215.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.86 : 239.37 = 156.28 : x
  2. Step 2: Convert to fraction form
    173.86/239.37 = 156.28/x
  3. Step 3: Cross multiply
    173.86x = 239.37 × 156.28
  4. Step 4: Simplify right side
    173.86x = 37,408.89
  5. Step 5: Solve for x
    x = 37,408.89/173.86
  6. Step 6: Final answer
    x = 215.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.