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Finding the Fourth Proportional to 276.06, 380.91 and 172.50

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Solution

The fourth proportional to 276.06, 380.91 and 172.50 is: 238.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.06 : 380.91 = 172.50 : x
  2. Step 2: Convert to fraction form
    276.06/380.91 = 172.50/x
  3. Step 3: Cross multiply
    276.06x = 380.91 × 172.50
  4. Step 4: Simplify right side
    276.06x = 65,706.98
  5. Step 5: Solve for x
    x = 65,706.98/276.06
  6. Step 6: Final answer
    x = 238.02

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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.