Home / 4,259.56-6,389.64-1,139.56

Finding the Fourth Proportional to 4,259.56, 6,389.64 and 1,139.56

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Solution

The fourth proportional to 4,259.56, 6,389.64 and 1,139.56 is: 1,709.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,259.56 : 6,389.64 = 1,139.56 : x
  2. Step 2: Convert to fraction form
    4,259.56/6,389.64 = 1,139.56/x
  3. Step 3: Cross multiply
    4,259.56x = 6,389.64 × 1,139.56
  4. Step 4: Simplify right side
    4,259.56x = 7,281,378.16
  5. Step 5: Solve for x
    x = 7,281,378.16/4,259.56
  6. Step 6: Final answer
    x = 1,709.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.