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Finding the Fourth Proportional to 647.86, 971.81 and 160.92

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Solution

The fourth proportional to 647.86, 971.81 and 160.92 is: 241.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.86 : 971.81 = 160.92 : x
  2. Step 2: Convert to fraction form
    647.86/971.81 = 160.92/x
  3. Step 3: Cross multiply
    647.86x = 971.81 × 160.92
  4. Step 4: Simplify right side
    647.86x = 156,383.67
  5. Step 5: Solve for x
    x = 156,383.67/647.86
  6. Step 6: Final answer
    x = 241.38

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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.