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Finding the Fourth Proportional to 539.05, 808.58 and 409.32

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Solution

The fourth proportional to 539.05, 808.58 and 409.32 is: 613.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.05 : 808.58 = 409.32 : x
  2. Step 2: Convert to fraction form
    539.05/808.58 = 409.32/x
  3. Step 3: Cross multiply
    539.05x = 808.58 × 409.32
  4. Step 4: Simplify right side
    539.05x = 330,967.97
  5. Step 5: Solve for x
    x = 330,967.97/539.05
  6. Step 6: Final answer
    x = 613.98

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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.