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Finding the Fourth Proportional to 614.22, 847.71 and 381.42

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Solution

The fourth proportional to 614.22, 847.71 and 381.42 is: 526.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.22 : 847.71 = 381.42 : x
  2. Step 2: Convert to fraction form
    614.22/847.71 = 381.42/x
  3. Step 3: Cross multiply
    614.22x = 847.71 × 381.42
  4. Step 4: Simplify right side
    614.22x = 323,333.55
  5. Step 5: Solve for x
    x = 323,333.55/614.22
  6. Step 6: Final answer
    x = 526.41

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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.