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Finding the Fourth Proportional to 261.37, 392.56 and 192.62

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Solution

The fourth proportional to 261.37, 392.56 and 192.62 is: 289.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.37 : 392.56 = 192.62 : x
  2. Step 2: Convert to fraction form
    261.37/392.56 = 192.62/x
  3. Step 3: Cross multiply
    261.37x = 392.56 × 192.62
  4. Step 4: Simplify right side
    261.37x = 75,614.91
  5. Step 5: Solve for x
    x = 75,614.91/261.37
  6. Step 6: Final answer
    x = 289.30

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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.