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Finding the Fourth Proportional to 518.40, 774.11 and 450.09

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Solution

The fourth proportional to 518.40, 774.11 and 450.09 is: 672.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.40 : 774.11 = 450.09 : x
  2. Step 2: Convert to fraction form
    518.40/774.11 = 450.09/x
  3. Step 3: Cross multiply
    518.40x = 774.11 × 450.09
  4. Step 4: Simplify right side
    518.40x = 348,420.30
  5. Step 5: Solve for x
    x = 348,420.30/518.40
  6. Step 6: Final answer
    x = 672.11

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.