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Finding the Fourth Proportional to 540.80, 809.98 and 323.92

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Solution

The fourth proportional to 540.80, 809.98 and 323.92 is: 485.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.80 : 809.98 = 323.92 : x
  2. Step 2: Convert to fraction form
    540.80/809.98 = 323.92/x
  3. Step 3: Cross multiply
    540.80x = 809.98 × 323.92
  4. Step 4: Simplify right side
    540.80x = 262,368.72
  5. Step 5: Solve for x
    x = 262,368.72/540.80
  6. Step 6: Final answer
    x = 485.15

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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.