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Finding the Fourth Proportional to 493.86, 681.65 and 328.08

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Solution

The fourth proportional to 493.86, 681.65 and 328.08 is: 452.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.86 : 681.65 = 328.08 : x
  2. Step 2: Convert to fraction form
    493.86/681.65 = 328.08/x
  3. Step 3: Cross multiply
    493.86x = 681.65 × 328.08
  4. Step 4: Simplify right side
    493.86x = 223,635.73
  5. Step 5: Solve for x
    x = 223,635.73/493.86
  6. Step 6: Final answer
    x = 452.83

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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.