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Finding the Fourth Proportional to 277.29, 415.19 and 155.39

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Solution

The fourth proportional to 277.29, 415.19 and 155.39 is: 232.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    277.29 : 415.19 = 155.39 : x
  2. Step 2: Convert to fraction form
    277.29/415.19 = 155.39/x
  3. Step 3: Cross multiply
    277.29x = 415.19 × 155.39
  4. Step 4: Simplify right side
    277.29x = 64,514.69
  5. Step 5: Solve for x
    x = 64,514.69/277.29
  6. Step 6: Final answer
    x = 232.66

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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.