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Finding the Fourth Proportional to 173.17, 238.64 and 156.39

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Solution

The fourth proportional to 173.17, 238.64 and 156.39 is: 215.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.17 : 238.64 = 156.39 : x
  2. Step 2: Convert to fraction form
    173.17/238.64 = 156.39/x
  3. Step 3: Cross multiply
    173.17x = 238.64 × 156.39
  4. Step 4: Simplify right side
    173.17x = 37,320.13
  5. Step 5: Solve for x
    x = 37,320.13/173.17
  6. Step 6: Final answer
    x = 215.51

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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.