Home / 2,688.20-3,709.72-1,509.28

Finding the Fourth Proportional to 2,688.20, 3,709.72 and 1,509.28

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Solution

The fourth proportional to 2,688.20, 3,709.72 and 1,509.28 is: 2,082.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688.20 : 3,709.72 = 1,509.28 : x
  2. Step 2: Convert to fraction form
    2,688.20/3,709.72 = 1,509.28/x
  3. Step 3: Cross multiply
    2,688.20x = 3,709.72 × 1,509.28
  4. Step 4: Simplify right side
    2,688.20x = 5,599,006.20
  5. Step 5: Solve for x
    x = 5,599,006.20/2,688.20
  6. Step 6: Final answer
    x = 2,082.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.