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Finding the Fourth Proportional to 1,353.92, 2,031.05 and 380.03

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Solution

The fourth proportional to 1,353.92, 2,031.05 and 380.03 is: 570.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,353.92 : 2,031.05 = 380.03 : x
  2. Step 2: Convert to fraction form
    1,353.92/2,031.05 = 380.03/x
  3. Step 3: Cross multiply
    1,353.92x = 2,031.05 × 380.03
  4. Step 4: Simplify right side
    1,353.92x = 771,850.73
  5. Step 5: Solve for x
    x = 771,850.73/1,353.92
  6. Step 6: Final answer
    x = 570.09

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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.