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Finding the Fourth Proportional to 647.86, 971.87 and 237.19

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Solution

The fourth proportional to 647.86, 971.87 and 237.19 is: 355.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.86 : 971.87 = 237.19 : x
  2. Step 2: Convert to fraction form
    647.86/971.87 = 237.19/x
  3. Step 3: Cross multiply
    647.86x = 971.87 × 237.19
  4. Step 4: Simplify right side
    647.86x = 230,517.85
  5. Step 5: Solve for x
    x = 230,517.85/647.86
  6. Step 6: Final answer
    x = 355.81

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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.