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Finding the Fourth Proportional to 266.18, 399.05 and 120.01

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Solution

The fourth proportional to 266.18, 399.05 and 120.01 is: 179.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.18 : 399.05 = 120.01 : x
  2. Step 2: Convert to fraction form
    266.18/399.05 = 120.01/x
  3. Step 3: Cross multiply
    266.18x = 399.05 × 120.01
  4. Step 4: Simplify right side
    266.18x = 47,889.29
  5. Step 5: Solve for x
    x = 47,889.29/266.18
  6. Step 6: Final answer
    x = 179.91

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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.