Home / 1,408.10-2,112.60-891.32

Finding the Fourth Proportional to 1,408.10, 2,112.60 and 891.32

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Solution

The fourth proportional to 1,408.10, 2,112.60 and 891.32 is: 1,337.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,408.10 : 2,112.60 = 891.32 : x
  2. Step 2: Convert to fraction form
    1,408.10/2,112.60 = 891.32/x
  3. Step 3: Cross multiply
    1,408.10x = 2,112.60 × 891.32
  4. Step 4: Simplify right side
    1,408.10x = 1,883,002.63
  5. Step 5: Solve for x
    x = 1,883,002.63/1,408.10
  6. Step 6: Final answer
    x = 1,337.26

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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.