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Finding the Fourth Proportional to 391.37, 539.06 and 373.14

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Solution

The fourth proportional to 391.37, 539.06 and 373.14 is: 513.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    391.37 : 539.06 = 373.14 : x
  2. Step 2: Convert to fraction form
    391.37/539.06 = 373.14/x
  3. Step 3: Cross multiply
    391.37x = 539.06 × 373.14
  4. Step 4: Simplify right side
    391.37x = 201,142.98
  5. Step 5: Solve for x
    x = 201,142.98/391.37
  6. Step 6: Final answer
    x = 513.95

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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.