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Finding the Fourth Proportional to 902.76, 1,353.72 and 512.76

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Solution

The fourth proportional to 902.76, 1,353.72 and 512.76 is: 768.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.76 : 1,353.72 = 512.76 : x
  2. Step 2: Convert to fraction form
    902.76/1,353.72 = 512.76/x
  3. Step 3: Cross multiply
    902.76x = 1,353.72 × 512.76
  4. Step 4: Simplify right side
    902.76x = 694,133.47
  5. Step 5: Solve for x
    x = 694,133.47/902.76
  6. Step 6: Final answer
    x = 768.90

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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.