Home / 3,408.40-5,111.79-2,312.47

Finding the Fourth Proportional to 3,408.40, 5,111.79 and 2,312.47

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Solution

The fourth proportional to 3,408.40, 5,111.79 and 2,312.47 is: 3,468.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,408.40 : 5,111.79 = 2,312.47 : x
  2. Step 2: Convert to fraction form
    3,408.40/5,111.79 = 2,312.47/x
  3. Step 3: Cross multiply
    3,408.40x = 5,111.79 × 2,312.47
  4. Step 4: Simplify right side
    3,408.40x = 11,820,861.02
  5. Step 5: Solve for x
    x = 11,820,861.02/3,408.40
  6. Step 6: Final answer
    x = 3,468.16

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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.