Home / 5,120.38-7,680.30-1,657.36

Finding the Fourth Proportional to 5,120.38, 7,680.30 and 1,657.36

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Solution

The fourth proportional to 5,120.38, 7,680.30 and 1,657.36 is: 2,485.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,120.38 : 7,680.30 = 1,657.36 : x
  2. Step 2: Convert to fraction form
    5,120.38/7,680.30 = 1,657.36/x
  3. Step 3: Cross multiply
    5,120.38x = 7,680.30 × 1,657.36
  4. Step 4: Simplify right side
    5,120.38x = 12,729,022.01
  5. Step 5: Solve for x
    x = 12,729,022.01/5,120.38
  6. Step 6: Final answer
    x = 2,485.95

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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.