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Finding the Fourth Proportional to 273.20, 409.19 and 260.44

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Solution

The fourth proportional to 273.20, 409.19 and 260.44 is: 390.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    273.20 : 409.19 = 260.44 : x
  2. Step 2: Convert to fraction form
    273.20/409.19 = 260.44/x
  3. Step 3: Cross multiply
    273.20x = 409.19 × 260.44
  4. Step 4: Simplify right side
    273.20x = 106,567.12
  5. Step 5: Solve for x
    x = 106,567.12/273.20
  6. Step 6: Final answer
    x = 390.08

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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.