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Finding the Fourth Proportional to 514.30, 771.18 and 331.51

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Solution

The fourth proportional to 514.30, 771.18 and 331.51 is: 497.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.30 : 771.18 = 331.51 : x
  2. Step 2: Convert to fraction form
    514.30/771.18 = 331.51/x
  3. Step 3: Cross multiply
    514.30x = 771.18 × 331.51
  4. Step 4: Simplify right side
    514.30x = 255,653.88
  5. Step 5: Solve for x
    x = 255,653.88/514.30
  6. Step 6: Final answer
    x = 497.09

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.