Home / 3,131.79-4,319.85-2,384.11

Finding the Fourth Proportional to 3,131.79, 4,319.85 and 2,384.11

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Solution

The fourth proportional to 3,131.79, 4,319.85 and 2,384.11 is: 3,288.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.79 : 4,319.85 = 2,384.11 : x
  2. Step 2: Convert to fraction form
    3,131.79/4,319.85 = 2,384.11/x
  3. Step 3: Cross multiply
    3,131.79x = 4,319.85 × 2,384.11
  4. Step 4: Simplify right side
    3,131.79x = 10,298,997.58
  5. Step 5: Solve for x
    x = 10,298,997.58/3,131.79
  6. Step 6: Final answer
    x = 3,288.53

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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.