Home / 5,120.32-7,680.47-1,610.64

Finding the Fourth Proportional to 5,120.32, 7,680.47 and 1,610.64

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Solution

The fourth proportional to 5,120.32, 7,680.47 and 1,610.64 is: 2,415.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,120.32 : 7,680.47 = 1,610.64 : x
  2. Step 2: Convert to fraction form
    5,120.32/7,680.47 = 1,610.64/x
  3. Step 3: Cross multiply
    5,120.32x = 7,680.47 × 1,610.64
  4. Step 4: Simplify right side
    5,120.32x = 12,370,469.20
  5. Step 5: Solve for x
    x = 12,370,469.20/5,120.32
  6. Step 6: Final answer
    x = 2,415.96

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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.