Home / 5,151.44-7,728.28-1,688.56

Finding the Fourth Proportional to 5,151.44, 7,728.28 and 1,688.56

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Solution

The fourth proportional to 5,151.44, 7,728.28 and 1,688.56 is: 2,533.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,151.44 : 7,728.28 = 1,688.56 : x
  2. Step 2: Convert to fraction form
    5,151.44/7,728.28 = 1,688.56/x
  3. Step 3: Cross multiply
    5,151.44x = 7,728.28 × 1,688.56
  4. Step 4: Simplify right side
    5,151.44x = 13,049,664.48
  5. Step 5: Solve for x
    x = 13,049,664.48/5,151.44
  6. Step 6: Final answer
    x = 2,533.21

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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.