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Finding the Fourth Proportional to 276.34, 381.35 and 152.00

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Solution

The fourth proportional to 276.34, 381.35 and 152.00 is: 209.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.34 : 381.35 = 152.00 : x
  2. Step 2: Convert to fraction form
    276.34/381.35 = 152.00/x
  3. Step 3: Cross multiply
    276.34x = 381.35 × 152.00
  4. Step 4: Simplify right side
    276.34x = 57,963.96
  5. Step 5: Solve for x
    x = 57,963.96/276.34
  6. Step 6: Final answer
    x = 209.76

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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.