Home / 2,515.81-3,469.28-1,806.40

Finding the Fourth Proportional to 2,515.81, 3,469.28 and 1,806.40

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Solution

The fourth proportional to 2,515.81, 3,469.28 and 1,806.40 is: 2,491.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,515.81 : 3,469.28 = 1,806.40 : x
  2. Step 2: Convert to fraction form
    2,515.81/3,469.28 = 1,806.40/x
  3. Step 3: Cross multiply
    2,515.81x = 3,469.28 × 1,806.40
  4. Step 4: Simplify right side
    2,515.81x = 6,266,912.86
  5. Step 5: Solve for x
    x = 6,266,912.86/2,515.81
  6. Step 6: Final answer
    x = 2,491.01

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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.