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Finding the Fourth Proportional to 1,408.95, 2,112.81 and 484.26

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Solution

The fourth proportional to 1,408.95, 2,112.81 and 484.26 is: 726.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,408.95 : 2,112.81 = 484.26 : x
  2. Step 2: Convert to fraction form
    1,408.95/2,112.81 = 484.26/x
  3. Step 3: Cross multiply
    1,408.95x = 2,112.81 × 484.26
  4. Step 4: Simplify right side
    1,408.95x = 1,023,149.37
  5. Step 5: Solve for x
    x = 1,023,149.37/1,408.95
  6. Step 6: Final answer
    x = 726.18

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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.