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Finding the Fourth Proportional to 392.76, 542.58 and 365.40

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Solution

The fourth proportional to 392.76, 542.58 and 365.40 is: 504.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.76 : 542.58 = 365.40 : x
  2. Step 2: Convert to fraction form
    392.76/542.58 = 365.40/x
  3. Step 3: Cross multiply
    392.76x = 542.58 × 365.40
  4. Step 4: Simplify right side
    392.76x = 198,258.73
  5. Step 5: Solve for x
    x = 198,258.73/392.76
  6. Step 6: Final answer
    x = 504.78

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Find fourth proportional to 196.38, 271.29 and 182.70
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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.