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Finding the Fourth Proportional to 539.82, 808.52 and 486.36

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Solution

The fourth proportional to 539.82, 808.52 and 486.36 is: 728.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.82 : 808.52 = 486.36 : x
  2. Step 2: Convert to fraction form
    539.82/808.52 = 486.36/x
  3. Step 3: Cross multiply
    539.82x = 808.52 × 486.36
  4. Step 4: Simplify right side
    539.82x = 393,229.36
  5. Step 5: Solve for x
    x = 393,229.36/539.82
  6. Step 6: Final answer
    x = 728.45

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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.