Home / 3,123.09-4,309.79-1,706.79

Finding the Fourth Proportional to 3,123.09, 4,309.79 and 1,706.79

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Solution

The fourth proportional to 3,123.09, 4,309.79 and 1,706.79 is: 2,355.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123.09 : 4,309.79 = 1,706.79 : x
  2. Step 2: Convert to fraction form
    3,123.09/4,309.79 = 1,706.79/x
  3. Step 3: Cross multiply
    3,123.09x = 4,309.79 × 1,706.79
  4. Step 4: Simplify right side
    3,123.09x = 7,355,906.47
  5. Step 5: Solve for x
    x = 7,355,906.47/3,123.09
  6. Step 6: Final answer
    x = 2,355.33

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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.