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Finding the Fourth Proportional to 192.40, 265.86 and 157.32

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Solution

The fourth proportional to 192.40, 265.86 and 157.32 is: 217.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.40 : 265.86 = 157.32 : x
  2. Step 2: Convert to fraction form
    192.40/265.86 = 157.32/x
  3. Step 3: Cross multiply
    192.40x = 265.86 × 157.32
  4. Step 4: Simplify right side
    192.40x = 41,825.10
  5. Step 5: Solve for x
    x = 41,825.10/192.40
  6. Step 6: Final answer
    x = 217.39

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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.