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Finding the Fourth Proportional to 539.64, 808.65 and 231.21

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Solution

The fourth proportional to 539.64, 808.65 and 231.21 is: 346.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.64 : 808.65 = 231.21 : x
  2. Step 2: Convert to fraction form
    539.64/808.65 = 231.21/x
  3. Step 3: Cross multiply
    539.64x = 808.65 × 231.21
  4. Step 4: Simplify right side
    539.64x = 186,967.97
  5. Step 5: Solve for x
    x = 186,967.97/539.64
  6. Step 6: Final answer
    x = 346.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.