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Finding the Fourth Proportional to 555.86, 766.99 and 331.73

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Solution

The fourth proportional to 555.86, 766.99 and 331.73 is: 457.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.86 : 766.99 = 331.73 : x
  2. Step 2: Convert to fraction form
    555.86/766.99 = 331.73/x
  3. Step 3: Cross multiply
    555.86x = 766.99 × 331.73
  4. Step 4: Simplify right side
    555.86x = 254,431.18
  5. Step 5: Solve for x
    x = 254,431.18/555.86
  6. Step 6: Final answer
    x = 457.72

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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.