Home / 1,408.80-2,115.30-892.02

Finding the Fourth Proportional to 1,408.80, 2,115.30 and 892.02

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Solution

The fourth proportional to 1,408.80, 2,115.30 and 892.02 is: 1,339.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,408.80 : 2,115.30 = 892.02 : x
  2. Step 2: Convert to fraction form
    1,408.80/2,115.30 = 892.02/x
  3. Step 3: Cross multiply
    1,408.80x = 2,115.30 × 892.02
  4. Step 4: Simplify right side
    1,408.80x = 1,886,889.91
  5. Step 5: Solve for x
    x = 1,886,889.91/1,408.80
  6. Step 6: Final answer
    x = 1,339.36

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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.