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Finding the Fourth Proportional to 547.86, 755 and 392.34

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Solution

The fourth proportional to 547.86, 755 and 392.34 is: 540.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.86 : 755 = 392.34 : x
  2. Step 2: Convert to fraction form
    547.86/755 = 392.34/x
  3. Step 3: Cross multiply
    547.86x = 755 × 392.34
  4. Step 4: Simplify right side
    547.86x = 296,216.70
  5. Step 5: Solve for x
    x = 296,216.70/547.86
  6. Step 6: Final answer
    x = 540.68

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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.