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Finding the Fourth Proportional to 471.18, 648.81 and 372.90

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Solution

The fourth proportional to 471.18, 648.81 and 372.90 is: 513.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.18 : 648.81 = 372.90 : x
  2. Step 2: Convert to fraction form
    471.18/648.81 = 372.90/x
  3. Step 3: Cross multiply
    471.18x = 648.81 × 372.90
  4. Step 4: Simplify right side
    471.18x = 241,941.25
  5. Step 5: Solve for x
    x = 241,941.25/471.18
  6. Step 6: Final answer
    x = 513.48

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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.