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Finding the Fourth Proportional to 649.75, 974.61 and 162.81

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Solution

The fourth proportional to 649.75, 974.61 and 162.81 is: 244.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.75 : 974.61 = 162.81 : x
  2. Step 2: Convert to fraction form
    649.75/974.61 = 162.81/x
  3. Step 3: Cross multiply
    649.75x = 974.61 × 162.81
  4. Step 4: Simplify right side
    649.75x = 158,676.25
  5. Step 5: Solve for x
    x = 158,676.25/649.75
  6. Step 6: Final answer
    x = 244.21

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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.