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Finding the Fourth Proportional to 1,265.43, 1,898.43 and 443.73

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Solution

The fourth proportional to 1,265.43, 1,898.43 and 443.73 is: 665.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,265.43 : 1,898.43 = 443.73 : x
  2. Step 2: Convert to fraction form
    1,265.43/1,898.43 = 443.73/x
  3. Step 3: Cross multiply
    1,265.43x = 1,898.43 × 443.73
  4. Step 4: Simplify right side
    1,265.43x = 842,390.34
  5. Step 5: Solve for x
    x = 842,390.34/1,265.43
  6. Step 6: Final answer
    x = 665.69

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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.