Home / 3,407.60-5,111.40-942.80

Finding the Fourth Proportional to 3,407.60, 5,111.40 and 942.80

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Solution

The fourth proportional to 3,407.60, 5,111.40 and 942.80 is: 1,414.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,407.60 : 5,111.40 = 942.80 : x
  2. Step 2: Convert to fraction form
    3,407.60/5,111.40 = 942.80/x
  3. Step 3: Cross multiply
    3,407.60x = 5,111.40 × 942.80
  4. Step 4: Simplify right side
    3,407.60x = 4,819,027.92
  5. Step 5: Solve for x
    x = 4,819,027.92/3,407.60
  6. Step 6: Final answer
    x = 1,414.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.