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Finding the Fourth Proportional to 471.96, 651.17 and 285.56

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Solution

The fourth proportional to 471.96, 651.17 and 285.56 is: 393.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.96 : 651.17 = 285.56 : x
  2. Step 2: Convert to fraction form
    471.96/651.17 = 285.56/x
  3. Step 3: Cross multiply
    471.96x = 651.17 × 285.56
  4. Step 4: Simplify right side
    471.96x = 185,943.42
  5. Step 5: Solve for x
    x = 185,943.42/471.96
  6. Step 6: Final answer
    x = 393.98

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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.