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Finding the Fourth Proportional to 539.81, 808.88 and 261.84

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Solution

The fourth proportional to 539.81, 808.88 and 261.84 is: 392.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.81 : 808.88 = 261.84 : x
  2. Step 2: Convert to fraction form
    539.81/808.88 = 261.84/x
  3. Step 3: Cross multiply
    539.81x = 808.88 × 261.84
  4. Step 4: Simplify right side
    539.81x = 211,795.83
  5. Step 5: Solve for x
    x = 211,795.83/539.81
  6. Step 6: Final answer
    x = 392.36

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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.