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Finding the Fourth Proportional to 375.21, 561.45 and 228.43

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Solution

The fourth proportional to 375.21, 561.45 and 228.43 is: 341.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    375.21 : 561.45 = 228.43 : x
  2. Step 2: Convert to fraction form
    375.21/561.45 = 228.43/x
  3. Step 3: Cross multiply
    375.21x = 561.45 × 228.43
  4. Step 4: Simplify right side
    375.21x = 128,249.48
  5. Step 5: Solve for x
    x = 128,249.48/375.21
  6. Step 6: Final answer
    x = 341.81

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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.