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Finding the Fourth Proportional to 902.66, 1,352.43 and 439.85

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Solution

The fourth proportional to 902.66, 1,352.43 and 439.85 is: 659.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.66 : 1,352.43 = 439.85 : x
  2. Step 2: Convert to fraction form
    902.66/1,352.43 = 439.85/x
  3. Step 3: Cross multiply
    902.66x = 1,352.43 × 439.85
  4. Step 4: Simplify right side
    902.66x = 594,869.72
  5. Step 5: Solve for x
    x = 594,869.72/902.66
  6. Step 6: Final answer
    x = 659.02

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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.