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Finding the Fourth Proportional to 375.09, 561.21 and 266.95

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Solution

The fourth proportional to 375.09, 561.21 and 266.95 is: 399.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    375.09 : 561.21 = 266.95 : x
  2. Step 2: Convert to fraction form
    375.09/561.21 = 266.95/x
  3. Step 3: Cross multiply
    375.09x = 561.21 × 266.95
  4. Step 4: Simplify right side
    375.09x = 149,815.01
  5. Step 5: Solve for x
    x = 149,815.01/375.09
  6. Step 6: Final answer
    x = 399.41

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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.