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Finding the Fourth Proportional to 514.50, 772.29 and 319.70

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Solution

The fourth proportional to 514.50, 772.29 and 319.70 is: 479.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.50 : 772.29 = 319.70 : x
  2. Step 2: Convert to fraction form
    514.50/772.29 = 319.70/x
  3. Step 3: Cross multiply
    514.50x = 772.29 × 319.70
  4. Step 4: Simplify right side
    514.50x = 246,897.25
  5. Step 5: Solve for x
    x = 246,897.25/514.50
  6. Step 6: Final answer
    x = 479.88

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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.