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Finding the Fourth Proportional to 902.22, 1,353.28 and 317.18

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Solution

The fourth proportional to 902.22, 1,353.28 and 317.18 is: 475.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.22 : 1,353.28 = 317.18 : x
  2. Step 2: Convert to fraction form
    902.22/1,353.28 = 317.18/x
  3. Step 3: Cross multiply
    902.22x = 1,353.28 × 317.18
  4. Step 4: Simplify right side
    902.22x = 429,233.35
  5. Step 5: Solve for x
    x = 429,233.35/902.22
  6. Step 6: Final answer
    x = 475.75

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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.