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Finding the Fourth Proportional to 902.17, 1,353.26 and 285.94

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Solution

The fourth proportional to 902.17, 1,353.26 and 285.94 is: 428.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.17 : 1,353.26 = 285.94 : x
  2. Step 2: Convert to fraction form
    902.17/1,353.26 = 285.94/x
  3. Step 3: Cross multiply
    902.17x = 1,353.26 × 285.94
  4. Step 4: Simplify right side
    902.17x = 386,951.16
  5. Step 5: Solve for x
    x = 386,951.16/902.17
  6. Step 6: Final answer
    x = 428.91

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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.