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Finding the Fourth Proportional to 902.15, 1,352.99 and 354.34

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Solution

The fourth proportional to 902.15, 1,352.99 and 354.34 is: 531.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.15 : 1,352.99 = 354.34 : x
  2. Step 2: Convert to fraction form
    902.15/1,352.99 = 354.34/x
  3. Step 3: Cross multiply
    902.15x = 1,352.99 × 354.34
  4. Step 4: Simplify right side
    902.15x = 479,421.05
  5. Step 5: Solve for x
    x = 479,421.05/902.15
  6. Step 6: Final answer
    x = 531.42

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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.