Home / 3,107.85-4,288.37-1,781.34

Finding the Fourth Proportional to 3,107.85, 4,288.37 and 1,781.34

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Solution

The fourth proportional to 3,107.85, 4,288.37 and 1,781.34 is: 2,457.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,107.85 : 4,288.37 = 1,781.34 : x
  2. Step 2: Convert to fraction form
    3,107.85/4,288.37 = 1,781.34/x
  3. Step 3: Cross multiply
    3,107.85x = 4,288.37 × 1,781.34
  4. Step 4: Simplify right side
    3,107.85x = 7,639,045.02
  5. Step 5: Solve for x
    x = 7,639,045.02/3,107.85
  6. Step 6: Final answer
    x = 2,457.98

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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.