Home / 3,111.20-4,294.08-1,785.81

Finding the Fourth Proportional to 3,111.20, 4,294.08 and 1,785.81

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Solution

The fourth proportional to 3,111.20, 4,294.08 and 1,785.81 is: 2,464.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,111.20 : 4,294.08 = 1,785.81 : x
  2. Step 2: Convert to fraction form
    3,111.20/4,294.08 = 1,785.81/x
  3. Step 3: Cross multiply
    3,111.20x = 4,294.08 × 1,785.81
  4. Step 4: Simplify right side
    3,111.20x = 7,668,411.00
  5. Step 5: Solve for x
    x = 7,668,411.00/3,111.20
  6. Step 6: Final answer
    x = 2,464.78

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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.