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Finding the Fourth Proportional to 584.40, 806.45 and 318.83

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Solution

The fourth proportional to 584.40, 806.45 and 318.83 is: 439.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    584.40 : 806.45 = 318.83 : x
  2. Step 2: Convert to fraction form
    584.40/806.45 = 318.83/x
  3. Step 3: Cross multiply
    584.40x = 806.45 × 318.83
  4. Step 4: Simplify right side
    584.40x = 257,120.45
  5. Step 5: Solve for x
    x = 257,120.45/584.40
  6. Step 6: Final answer
    x = 439.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.