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Finding the Fourth Proportional to 591.86, 817.47 and 481.76

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Solution

The fourth proportional to 591.86, 817.47 and 481.76 is: 665.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.86 : 817.47 = 481.76 : x
  2. Step 2: Convert to fraction form
    591.86/817.47 = 481.76/x
  3. Step 3: Cross multiply
    591.86x = 817.47 × 481.76
  4. Step 4: Simplify right side
    591.86x = 393,826.39
  5. Step 5: Solve for x
    x = 393,826.39/591.86
  6. Step 6: Final answer
    x = 665.41

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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.