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Finding the Fourth Proportional to 273.30, 409.45 and 143.10

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Solution

The fourth proportional to 273.30, 409.45 and 143.10 is: 214.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    273.30 : 409.45 = 143.10 : x
  2. Step 2: Convert to fraction form
    273.30/409.45 = 143.10/x
  3. Step 3: Cross multiply
    273.30x = 409.45 × 143.10
  4. Step 4: Simplify right side
    273.30x = 58,592.30
  5. Step 5: Solve for x
    x = 58,592.30/273.30
  6. Step 6: Final answer
    x = 214.39

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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.