Home / 3,105.08-4,285.09-1,688.87

Finding the Fourth Proportional to 3,105.08, 4,285.09 and 1,688.87

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Solution

The fourth proportional to 3,105.08, 4,285.09 and 1,688.87 is: 2,330.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,105.08 : 4,285.09 = 1,688.87 : x
  2. Step 2: Convert to fraction form
    3,105.08/4,285.09 = 1,688.87/x
  3. Step 3: Cross multiply
    3,105.08x = 4,285.09 × 1,688.87
  4. Step 4: Simplify right side
    3,105.08x = 7,236,939.17
  5. Step 5: Solve for x
    x = 7,236,939.17/3,105.08
  6. Step 6: Final answer
    x = 2,330.67

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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.