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Finding the Fourth Proportional to 539.45, 805.00 and 481.20

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Solution

The fourth proportional to 539.45, 805.00 and 481.20 is: 718.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.45 : 805.00 = 481.20 : x
  2. Step 2: Convert to fraction form
    539.45/805.00 = 481.20/x
  3. Step 3: Cross multiply
    539.45x = 805.00 × 481.20
  4. Step 4: Simplify right side
    539.45x = 387,363.59
  5. Step 5: Solve for x
    x = 387,363.59/539.45
  6. Step 6: Final answer
    x = 718.08

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.