Home / 3,131.30-4,311.36-2,658.22

Finding the Fourth Proportional to 3,131.30, 4,311.36 and 2,658.22

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Solution

The fourth proportional to 3,131.30, 4,311.36 and 2,658.22 is: 3,659.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.30 : 4,311.36 = 2,658.22 : x
  2. Step 2: Convert to fraction form
    3,131.30/4,311.36 = 2,658.22/x
  3. Step 3: Cross multiply
    3,131.30x = 4,311.36 × 2,658.22
  4. Step 4: Simplify right side
    3,131.30x = 11,460,547.96
  5. Step 5: Solve for x
    x = 11,460,547.96/3,131.30
  6. Step 6: Final answer
    x = 3,659.99

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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.