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Finding the Fourth Proportional to 1,265.03, 1,896.39 and 442.85

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Solution

The fourth proportional to 1,265.03, 1,896.39 and 442.85 is: 663.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,265.03 : 1,896.39 = 442.85 : x
  2. Step 2: Convert to fraction form
    1,265.03/1,896.39 = 442.85/x
  3. Step 3: Cross multiply
    1,265.03x = 1,896.39 × 442.85
  4. Step 4: Simplify right side
    1,265.03x = 839,819.39
  5. Step 5: Solve for x
    x = 839,819.39/1,265.03
  6. Step 6: Final answer
    x = 663.87

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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.