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Finding the Fourth Proportional to 902.68, 1,352.85 and 354.40

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Solution

The fourth proportional to 902.68, 1,352.85 and 354.40 is: 531.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.68 : 1,352.85 = 354.40 : x
  2. Step 2: Convert to fraction form
    902.68/1,352.85 = 354.40/x
  3. Step 3: Cross multiply
    902.68x = 1,352.85 × 354.40
  4. Step 4: Simplify right side
    902.68x = 479,450.04
  5. Step 5: Solve for x
    x = 479,450.04/902.68
  6. Step 6: Final answer
    x = 531.14

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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.