Home / 2,268.81-3,131.30-1,385.13

Finding the Fourth Proportional to 2,268.81, 3,131.30 and 1,385.13

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Solution

The fourth proportional to 2,268.81, 3,131.30 and 1,385.13 is: 1,911.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,268.81 : 3,131.30 = 1,385.13 : x
  2. Step 2: Convert to fraction form
    2,268.81/3,131.30 = 1,385.13/x
  3. Step 3: Cross multiply
    2,268.81x = 3,131.30 × 1,385.13
  4. Step 4: Simplify right side
    2,268.81x = 4,337,241.91
  5. Step 5: Solve for x
    x = 4,337,241.91/2,268.81
  6. Step 6: Final answer
    x = 1,911.68

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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.