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Finding the Fourth Proportional to 273.51, 409.91 and 128.93

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Solution

The fourth proportional to 273.51, 409.91 and 128.93 is: 193.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    273.51 : 409.91 = 128.93 : x
  2. Step 2: Convert to fraction form
    273.51/409.91 = 128.93/x
  3. Step 3: Cross multiply
    273.51x = 409.91 × 128.93
  4. Step 4: Simplify right side
    273.51x = 52,849.02
  5. Step 5: Solve for x
    x = 52,849.02/273.51
  6. Step 6: Final answer
    x = 193.22

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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.