Home / 3,131.98-4,322.61-1,787.58

Finding the Fourth Proportional to 3,131.98, 4,322.61 and 1,787.58

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Solution

The fourth proportional to 3,131.98, 4,322.61 and 1,787.58 is: 2,467.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.98 : 4,322.61 = 1,787.58 : x
  2. Step 2: Convert to fraction form
    3,131.98/4,322.61 = 1,787.58/x
  3. Step 3: Cross multiply
    3,131.98x = 4,322.61 × 1,787.58
  4. Step 4: Simplify right side
    3,131.98x = 7,727,027.39
  5. Step 5: Solve for x
    x = 7,727,027.39/3,131.98
  6. Step 6: Final answer
    x = 2,467.14

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1.5x scale

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.