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Finding the Fourth Proportional to 540.37, 809.99 and 280.10

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Solution

The fourth proportional to 540.37, 809.99 and 280.10 is: 419.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.37 : 809.99 = 280.10 : x
  2. Step 2: Convert to fraction form
    540.37/809.99 = 280.10/x
  3. Step 3: Cross multiply
    540.37x = 809.99 × 280.10
  4. Step 4: Simplify right side
    540.37x = 226,873.78
  5. Step 5: Solve for x
    x = 226,873.78/540.37
  6. Step 6: Final answer
    x = 419.85

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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.