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Finding the Fourth Proportional to 647.26, 971.11 and 236.42

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Solution

The fourth proportional to 647.26, 971.11 and 236.42 is: 354.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.26 : 971.11 = 236.42 : x
  2. Step 2: Convert to fraction form
    647.26/971.11 = 236.42/x
  3. Step 3: Cross multiply
    647.26x = 971.11 × 236.42
  4. Step 4: Simplify right side
    647.26x = 229,588.91
  5. Step 5: Solve for x
    x = 229,588.91/647.26
  6. Step 6: Final answer
    x = 354.71

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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.