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Finding the Fourth Proportional to 539.96, 810.65 and 320.99

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Solution

The fourth proportional to 539.96, 810.65 and 320.99 is: 481.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.96 : 810.65 = 320.99 : x
  2. Step 2: Convert to fraction form
    539.96/810.65 = 320.99/x
  3. Step 3: Cross multiply
    539.96x = 810.65 × 320.99
  4. Step 4: Simplify right side
    539.96x = 260,210.54
  5. Step 5: Solve for x
    x = 260,210.54/539.96
  6. Step 6: Final answer
    x = 481.91

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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.