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Finding the Fourth Proportional to 390.79, 539.25 and 241.48

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Solution

The fourth proportional to 390.79, 539.25 and 241.48 is: 333.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    390.79 : 539.25 = 241.48 : x
  2. Step 2: Convert to fraction form
    390.79/539.25 = 241.48/x
  3. Step 3: Cross multiply
    390.79x = 539.25 × 241.48
  4. Step 4: Simplify right side
    390.79x = 130,218.09
  5. Step 5: Solve for x
    x = 130,218.09/390.79
  6. Step 6: Final answer
    x = 333.22

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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.