Home / 1,408.64-2,112.35-531.11

Finding the Fourth Proportional to 1,408.64, 2,112.35 and 531.11

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Solution

The fourth proportional to 1,408.64, 2,112.35 and 531.11 is: 796.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,408.64 : 2,112.35 = 531.11 : x
  2. Step 2: Convert to fraction form
    1,408.64/2,112.35 = 531.11/x
  3. Step 3: Cross multiply
    1,408.64x = 2,112.35 × 531.11
  4. Step 4: Simplify right side
    1,408.64x = 1,121,892.83
  5. Step 5: Solve for x
    x = 1,121,892.83/1,408.64
  6. Step 6: Final answer
    x = 796.44

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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.