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Finding the Fourth Proportional to 392.21, 540.62 and 266.13

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Solution

The fourth proportional to 392.21, 540.62 and 266.13 is: 366.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.21 : 540.62 = 266.13 : x
  2. Step 2: Convert to fraction form
    392.21/540.62 = 266.13/x
  3. Step 3: Cross multiply
    392.21x = 540.62 × 266.13
  4. Step 4: Simplify right side
    392.21x = 143,873.87
  5. Step 5: Solve for x
    x = 143,873.87/392.21
  6. Step 6: Final answer
    x = 366.83

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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.