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Finding the Fourth Proportional to 539.36, 744.39 and 392.14

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Solution

The fourth proportional to 539.36, 744.39 and 392.14 is: 541.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.36 : 744.39 = 392.14 : x
  2. Step 2: Convert to fraction form
    539.36/744.39 = 392.14/x
  3. Step 3: Cross multiply
    539.36x = 744.39 × 392.14
  4. Step 4: Simplify right side
    539.36x = 291,905.09
  5. Step 5: Solve for x
    x = 291,905.09/539.36
  6. Step 6: Final answer
    x = 541.21

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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.