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Finding the Fourth Proportional to 277.10, 415.31 and 155.33

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Solution

The fourth proportional to 277.10, 415.31 and 155.33 is: 232.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    277.10 : 415.31 = 155.33 : x
  2. Step 2: Convert to fraction form
    277.10/415.31 = 155.33/x
  3. Step 3: Cross multiply
    277.10x = 415.31 × 155.33
  4. Step 4: Simplify right side
    277.10x = 64,507.25
  5. Step 5: Solve for x
    x = 64,507.25/277.10
  6. Step 6: Final answer
    x = 232.80

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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.