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Finding the Fourth Proportional to 193, 265.80 and 156.28

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Solution

The fourth proportional to 193, 265.80 and 156.28 is: 215.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    193 : 265.80 = 156.28 : x
  2. Step 2: Convert to fraction form
    193/265.80 = 156.28/x
  3. Step 3: Cross multiply
    193x = 265.80 × 156.28
  4. Step 4: Simplify right side
    193x = 41,539.22
  5. Step 5: Solve for x
    x = 41,539.22/193
  6. Step 6: Final answer
    x = 215.23

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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.