Home / 2,688.19-3,709.70-1,509.33

Finding the Fourth Proportional to 2,688.19, 3,709.70 and 1,509.33

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Solution

The fourth proportional to 2,688.19, 3,709.70 and 1,509.33 is: 2,082.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688.19 : 3,709.70 = 1,509.33 : x
  2. Step 2: Convert to fraction form
    2,688.19/3,709.70 = 1,509.33/x
  3. Step 3: Cross multiply
    2,688.19x = 3,709.70 × 1,509.33
  4. Step 4: Simplify right side
    2,688.19x = 5,599,173.53
  5. Step 5: Solve for x
    x = 5,599,173.53/2,688.19
  6. Step 6: Final answer
    x = 2,082.88

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1.5x scale

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.