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Finding the Fourth Proportional to 518.40, 774.23 and 450.09

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Solution

The fourth proportional to 518.40, 774.23 and 450.09 is: 672.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.40 : 774.23 = 450.09 : x
  2. Step 2: Convert to fraction form
    518.40/774.23 = 450.09/x
  3. Step 3: Cross multiply
    518.40x = 774.23 × 450.09
  4. Step 4: Simplify right side
    518.40x = 348,470.93
  5. Step 5: Solve for x
    x = 348,470.93/518.40
  6. Step 6: Final answer
    x = 672.20

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1.5x scale

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.