Home / 5,120.02-7,680.03-1,422.28

Finding the Fourth Proportional to 5,120.02, 7,680.03 and 1,422.28

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Solution

The fourth proportional to 5,120.02, 7,680.03 and 1,422.28 is: 2,133.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,120.02 : 7,680.03 = 1,422.28 : x
  2. Step 2: Convert to fraction form
    5,120.02/7,680.03 = 1,422.28/x
  3. Step 3: Cross multiply
    5,120.02x = 7,680.03 × 1,422.28
  4. Step 4: Simplify right side
    5,120.02x = 10,923,133.87
  5. Step 5: Solve for x
    x = 10,923,133.87/5,120.02
  6. Step 6: Final answer
    x = 2,133.42

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Similar ratio
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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.