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Finding the Fourth Proportional to 514.70, 771.98 and 319.71

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Solution

The fourth proportional to 514.70, 771.98 and 319.71 is: 479.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.70 : 771.98 = 319.71 : x
  2. Step 2: Convert to fraction form
    514.70/771.98 = 319.71/x
  3. Step 3: Cross multiply
    514.70x = 771.98 × 319.71
  4. Step 4: Simplify right side
    514.70x = 246,808.13
  5. Step 5: Solve for x
    x = 246,808.13/514.70
  6. Step 6: Final answer
    x = 479.52

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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.