Home / 3,107.40-4,288.44-1,781.52

Finding the Fourth Proportional to 3,107.40, 4,288.44 and 1,781.52

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Solution

The fourth proportional to 3,107.40, 4,288.44 and 1,781.52 is: 2,458.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,107.40 : 4,288.44 = 1,781.52 : x
  2. Step 2: Convert to fraction form
    3,107.40/4,288.44 = 1,781.52/x
  3. Step 3: Cross multiply
    3,107.40x = 4,288.44 × 1,781.52
  4. Step 4: Simplify right side
    3,107.40x = 7,639,941.63
  5. Step 5: Solve for x
    x = 7,639,941.63/3,107.40
  6. Step 6: Final answer
    x = 2,458.63

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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.