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Finding the Fourth Proportional to 392.76, 541.96 and 218.10

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Solution

The fourth proportional to 392.76, 541.96 and 218.10 is: 300.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.76 : 541.96 = 218.10 : x
  2. Step 2: Convert to fraction form
    392.76/541.96 = 218.10/x
  3. Step 3: Cross multiply
    392.76x = 541.96 × 218.10
  4. Step 4: Simplify right side
    392.76x = 118,201.48
  5. Step 5: Solve for x
    x = 118,201.48/392.76
  6. Step 6: Final answer
    x = 300.95

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Find fourth proportional to 196.38, 270.98 and 109.05
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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.