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Finding the Fourth Proportional to 374.56, 561.90 and 131.26

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Solution

The fourth proportional to 374.56, 561.90 and 131.26 is: 196.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.56 : 561.90 = 131.26 : x
  2. Step 2: Convert to fraction form
    374.56/561.90 = 131.26/x
  3. Step 3: Cross multiply
    374.56x = 561.90 × 131.26
  4. Step 4: Simplify right side
    374.56x = 73,754.99
  5. Step 5: Solve for x
    x = 73,754.99/374.56
  6. Step 6: Final answer
    x = 196.91

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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.