Home / 2,688.13-3,709.79-1,509.20

Finding the Fourth Proportional to 2,688.13, 3,709.79 and 1,509.20

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Solution

The fourth proportional to 2,688.13, 3,709.79 and 1,509.20 is: 2,082.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688.13 : 3,709.79 = 1,509.20 : x
  2. Step 2: Convert to fraction form
    2,688.13/3,709.79 = 1,509.20/x
  3. Step 3: Cross multiply
    2,688.13x = 3,709.79 × 1,509.20
  4. Step 4: Simplify right side
    2,688.13x = 5,598,815.07
  5. Step 5: Solve for x
    x = 5,598,815.07/2,688.13
  6. Step 6: Final answer
    x = 2,082.79

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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.