Home / 3,105.14-4,285.10-1,688.85

Finding the Fourth Proportional to 3,105.14, 4,285.10 and 1,688.85

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Solution

The fourth proportional to 3,105.14, 4,285.10 and 1,688.85 is: 2,330.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,105.14 : 4,285.10 = 1,688.85 : x
  2. Step 2: Convert to fraction form
    3,105.14/4,285.10 = 1,688.85/x
  3. Step 3: Cross multiply
    3,105.14x = 4,285.10 × 1,688.85
  4. Step 4: Simplify right side
    3,105.14x = 7,236,895.36
  5. Step 5: Solve for x
    x = 7,236,895.36/3,105.14
  6. Step 6: Final answer
    x = 2,330.62

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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.