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Finding the Fourth Proportional to 261.48, 392.22 and 124.44

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Solution

The fourth proportional to 261.48, 392.22 and 124.44 is: 186.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.48 : 392.22 = 124.44 : x
  2. Step 2: Convert to fraction form
    261.48/392.22 = 124.44/x
  3. Step 3: Cross multiply
    261.48x = 392.22 × 124.44
  4. Step 4: Simplify right side
    261.48x = 48,807.86
  5. Step 5: Solve for x
    x = 48,807.86/261.48
  6. Step 6: Final answer
    x = 186.66

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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.