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Finding the Fourth Proportional to 261.96, 393.08 and 107.96

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Solution

The fourth proportional to 261.96, 393.08 and 107.96 is: 162.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.96 : 393.08 = 107.96 : x
  2. Step 2: Convert to fraction form
    261.96/393.08 = 107.96/x
  3. Step 3: Cross multiply
    261.96x = 393.08 × 107.96
  4. Step 4: Simplify right side
    261.96x = 42,436.92
  5. Step 5: Solve for x
    x = 42,436.92/261.96
  6. Step 6: Final answer
    x = 162.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.