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Finding the Fourth Proportional to 514.99, 774.11 and 447.36

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Solution

The fourth proportional to 514.99, 774.11 and 447.36 is: 672.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.99 : 774.11 = 447.36 : x
  2. Step 2: Convert to fraction form
    514.99/774.11 = 447.36/x
  3. Step 3: Cross multiply
    514.99x = 774.11 × 447.36
  4. Step 4: Simplify right side
    514.99x = 346,305.85
  5. Step 5: Solve for x
    x = 346,305.85/514.99
  6. Step 6: Final answer
    x = 672.45

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Double scale
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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.