Home / 2,688.92-4,024.70-1,388.60

Finding the Fourth Proportional to 2,688.92, 4,024.70 and 1,388.60

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Solution

The fourth proportional to 2,688.92, 4,024.70 and 1,388.60 is: 2,078.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688.92 : 4,024.70 = 1,388.60 : x
  2. Step 2: Convert to fraction form
    2,688.92/4,024.70 = 1,388.60/x
  3. Step 3: Cross multiply
    2,688.92x = 4,024.70 × 1,388.60
  4. Step 4: Simplify right side
    2,688.92x = 5,588,698.42
  5. Step 5: Solve for x
    x = 5,588,698.42/2,688.92
  6. Step 6: Final answer
    x = 2,078.42

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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.