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Finding the Fourth Proportional to 471.87, 651.21 and 285.37

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Solution

The fourth proportional to 471.87, 651.21 and 285.37 is: 393.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.87 : 651.21 = 285.37 : x
  2. Step 2: Convert to fraction form
    471.87/651.21 = 285.37/x
  3. Step 3: Cross multiply
    471.87x = 651.21 × 285.37
  4. Step 4: Simplify right side
    471.87x = 185,832.54
  5. Step 5: Solve for x
    x = 185,832.54/471.87
  6. Step 6: Final answer
    x = 393.82

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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.