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Finding the Fourth Proportional to 276.66, 415.29 and 155.16

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Solution

The fourth proportional to 276.66, 415.29 and 155.16 is: 232.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.66 : 415.29 = 155.16 : x
  2. Step 2: Convert to fraction form
    276.66/415.29 = 155.16/x
  3. Step 3: Cross multiply
    276.66x = 415.29 × 155.16
  4. Step 4: Simplify right side
    276.66x = 64,436.40
  5. Step 5: Solve for x
    x = 64,436.40/276.66
  6. Step 6: Final answer
    x = 232.91

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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.