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Finding the Fourth Proportional to 392.76, 541.32 and 347.51

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Solution

The fourth proportional to 392.76, 541.32 and 347.51 is: 478.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.76 : 541.32 = 347.51 : x
  2. Step 2: Convert to fraction form
    392.76/541.32 = 347.51/x
  3. Step 3: Cross multiply
    392.76x = 541.32 × 347.51
  4. Step 4: Simplify right side
    392.76x = 188,111.41
  5. Step 5: Solve for x
    x = 188,111.41/392.76
  6. Step 6: Final answer
    x = 478.95

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Find fourth proportional to 196.38, 270.66 and 173.75
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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.