Home / 3,086.06-4,258.70-1,688.78

Finding the Fourth Proportional to 3,086.06, 4,258.70 and 1,688.78

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Solution

The fourth proportional to 3,086.06, 4,258.70 and 1,688.78 is: 2,330.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,086.06 : 4,258.70 = 1,688.78 : x
  2. Step 2: Convert to fraction form
    3,086.06/4,258.70 = 1,688.78/x
  3. Step 3: Cross multiply
    3,086.06x = 4,258.70 × 1,688.78
  4. Step 4: Simplify right side
    3,086.06x = 7,192,007.39
  5. Step 5: Solve for x
    x = 7,192,007.39/3,086.06
  6. Step 6: Final answer
    x = 2,330.48

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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.