Home / 3,710.20-5,120.78-2,385.56

Finding the Fourth Proportional to 3,710.20, 5,120.78 and 2,385.56

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Solution

The fourth proportional to 3,710.20, 5,120.78 and 2,385.56 is: 3,292.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,710.20 : 5,120.78 = 2,385.56 : x
  2. Step 2: Convert to fraction form
    3,710.20/5,120.78 = 2,385.56/x
  3. Step 3: Cross multiply
    3,710.20x = 5,120.78 × 2,385.56
  4. Step 4: Simplify right side
    3,710.20x = 12,215,927.94
  5. Step 5: Solve for x
    x = 12,215,927.94/3,710.20
  6. Step 6: Final answer
    x = 3,292.53

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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.