Home / 2,688.60-3,709.75-1,509.38

Finding the Fourth Proportional to 2,688.60, 3,709.75 and 1,509.38

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Solution

The fourth proportional to 2,688.60, 3,709.75 and 1,509.38 is: 2,082.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688.60 : 3,709.75 = 1,509.38 : x
  2. Step 2: Convert to fraction form
    2,688.60/3,709.75 = 1,509.38/x
  3. Step 3: Cross multiply
    2,688.60x = 3,709.75 × 1,509.38
  4. Step 4: Simplify right side
    2,688.60x = 5,599,422.46
  5. Step 5: Solve for x
    x = 5,599,422.46/2,688.60
  6. Step 6: Final answer
    x = 2,082.65

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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.