Home / 3,138.63-4,331.43-1,722.36

Finding the Fourth Proportional to 3,138.63, 4,331.43 and 1,722.36

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Solution

The fourth proportional to 3,138.63, 4,331.43 and 1,722.36 is: 2,376.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.63 : 4,331.43 = 1,722.36 : x
  2. Step 2: Convert to fraction form
    3,138.63/4,331.43 = 1,722.36/x
  3. Step 3: Cross multiply
    3,138.63x = 4,331.43 × 1,722.36
  4. Step 4: Simplify right side
    3,138.63x = 7,460,298.02
  5. Step 5: Solve for x
    x = 7,460,298.02/3,138.63
  6. Step 6: Final answer
    x = 2,376.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.