Home / 3,107.13-4,287.78-1,690.77

Finding the Fourth Proportional to 3,107.13, 4,287.78 and 1,690.77

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Solution

The fourth proportional to 3,107.13, 4,287.78 and 1,690.77 is: 2,333.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,107.13 : 4,287.78 = 1,690.77 : x
  2. Step 2: Convert to fraction form
    3,107.13/4,287.78 = 1,690.77/x
  3. Step 3: Cross multiply
    3,107.13x = 4,287.78 × 1,690.77
  4. Step 4: Simplify right side
    3,107.13x = 7,249,628.50
  5. Step 5: Solve for x
    x = 7,249,628.50/3,107.13
  6. Step 6: Final answer
    x = 2,333.23

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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.