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Finding the Fourth Proportional to 391.24, 539.16 and 365.29

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Solution

The fourth proportional to 391.24, 539.16 and 365.29 is: 503.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    391.24 : 539.16 = 365.29 : x
  2. Step 2: Convert to fraction form
    391.24/539.16 = 365.29/x
  3. Step 3: Cross multiply
    391.24x = 539.16 × 365.29
  4. Step 4: Simplify right side
    391.24x = 196,949.76
  5. Step 5: Solve for x
    x = 196,949.76/391.24
  6. Step 6: Final answer
    x = 503.40

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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.