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Finding the Fourth Proportional to 1,270.43, 1,905.93 and 448.73

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Solution

The fourth proportional to 1,270.43, 1,905.93 and 448.73 is: 673.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,270.43 : 1,905.93 = 448.73 : x
  2. Step 2: Convert to fraction form
    1,270.43/1,905.93 = 448.73/x
  3. Step 3: Cross multiply
    1,270.43x = 1,905.93 × 448.73
  4. Step 4: Simplify right side
    1,270.43x = 855,247.97
  5. Step 5: Solve for x
    x = 855,247.97/1,270.43
  6. Step 6: Final answer
    x = 673.20

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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.