Home / 3,121.79-4,308.03-1,705.46

Finding the Fourth Proportional to 3,121.79, 4,308.03 and 1,705.46

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Solution

The fourth proportional to 3,121.79, 4,308.03 and 1,705.46 is: 2,353.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.79 : 4,308.03 = 1,705.46 : x
  2. Step 2: Convert to fraction form
    3,121.79/4,308.03 = 1,705.46/x
  3. Step 3: Cross multiply
    3,121.79x = 4,308.03 × 1,705.46
  4. Step 4: Simplify right side
    3,121.79x = 7,347,151.30
  5. Step 5: Solve for x
    x = 7,347,151.30/3,121.79
  6. Step 6: Final answer
    x = 2,353.51

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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.