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Finding the Fourth Proportional to 273.70, 410.55 and 145.70

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Solution

The fourth proportional to 273.70, 410.55 and 145.70 is: 218.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    273.70 : 410.55 = 145.70 : x
  2. Step 2: Convert to fraction form
    273.70/410.55 = 145.70/x
  3. Step 3: Cross multiply
    273.70x = 410.55 × 145.70
  4. Step 4: Simplify right side
    273.70x = 59,817.14
  5. Step 5: Solve for x
    x = 59,817.14/273.70
  6. Step 6: Final answer
    x = 218.55

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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.