Home / 3,390.60-5,077.80-1,657.20

Finding the Fourth Proportional to 3,390.60, 5,077.80 and 1,657.20

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Solution

The fourth proportional to 3,390.60, 5,077.80 and 1,657.20 is: 2,481.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.60 : 5,077.80 = 1,657.20 : x
  2. Step 2: Convert to fraction form
    3,390.60/5,077.80 = 1,657.20/x
  3. Step 3: Cross multiply
    3,390.60x = 5,077.80 × 1,657.20
  4. Step 4: Simplify right side
    3,390.60x = 8,414,930.16
  5. Step 5: Solve for x
    x = 8,414,930.16/3,390.60
  6. Step 6: Final answer
    x = 2,481.84

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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.