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Finding the Fourth Proportional to 1,418.97, 2,128.14 and 444.95

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Solution

The fourth proportional to 1,418.97, 2,128.14 and 444.95 is: 667.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,418.97 : 2,128.14 = 444.95 : x
  2. Step 2: Convert to fraction form
    1,418.97/2,128.14 = 444.95/x
  3. Step 3: Cross multiply
    1,418.97x = 2,128.14 × 444.95
  4. Step 4: Simplify right side
    1,418.97x = 946,905.25
  5. Step 5: Solve for x
    x = 946,905.25/1,418.97
  6. Step 6: Final answer
    x = 667.32

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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.