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Finding the Fourth Proportional to 261.54, 392.00 and 107.39

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Solution

The fourth proportional to 261.54, 392.00 and 107.39 is: 160.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.54 : 392.00 = 107.39 : x
  2. Step 2: Convert to fraction form
    261.54/392.00 = 107.39/x
  3. Step 3: Cross multiply
    261.54x = 392.00 × 107.39
  4. Step 4: Simplify right side
    261.54x = 42,094.38
  5. Step 5: Solve for x
    x = 42,094.38/261.54
  6. Step 6: Final answer
    x = 160.95

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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.