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Finding the Fourth Proportional to 1,422.73, 2,134.10 and 448.71

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Solution

The fourth proportional to 1,422.73, 2,134.10 and 448.71 is: 673.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,422.73 : 2,134.10 = 448.71 : x
  2. Step 2: Convert to fraction form
    1,422.73/2,134.10 = 448.71/x
  3. Step 3: Cross multiply
    1,422.73x = 2,134.10 × 448.71
  4. Step 4: Simplify right side
    1,422.73x = 957,592.01
  5. Step 5: Solve for x
    x = 957,592.01/1,422.73
  6. Step 6: Final answer
    x = 673.07

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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.