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Finding the Fourth Proportional to 540.08, 809.49 and 215.54

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Solution

The fourth proportional to 540.08, 809.49 and 215.54 is: 323.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.08 : 809.49 = 215.54 : x
  2. Step 2: Convert to fraction form
    540.08/809.49 = 215.54/x
  3. Step 3: Cross multiply
    540.08x = 809.49 × 215.54
  4. Step 4: Simplify right side
    540.08x = 174,477.47
  5. Step 5: Solve for x
    x = 174,477.47/540.08
  6. Step 6: Final answer
    x = 323.06

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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.