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Finding the Fourth Proportional to 275.15, 379.70 and 150.81

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Solution

The fourth proportional to 275.15, 379.70 and 150.81 is: 208.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.15 : 379.70 = 150.81 : x
  2. Step 2: Convert to fraction form
    275.15/379.70 = 150.81/x
  3. Step 3: Cross multiply
    275.15x = 379.70 × 150.81
  4. Step 4: Simplify right side
    275.15x = 57,263.93
  5. Step 5: Solve for x
    x = 57,263.93/275.15
  6. Step 6: Final answer
    x = 208.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.