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Finding the Fourth Proportional to 555.87, 767.21 and 331.85

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Solution

The fourth proportional to 555.87, 767.21 and 331.85 is: 458.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.87 : 767.21 = 331.85 : x
  2. Step 2: Convert to fraction form
    555.87/767.21 = 331.85/x
  3. Step 3: Cross multiply
    555.87x = 767.21 × 331.85
  4. Step 4: Simplify right side
    555.87x = 254,593.14
  5. Step 5: Solve for x
    x = 254,593.14/555.87
  6. Step 6: Final answer
    x = 458.01

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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.