Home / 3,605.45-5,408.71-1,139.47

Finding the Fourth Proportional to 3,605.45, 5,408.71 and 1,139.47

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Solution

The fourth proportional to 3,605.45, 5,408.71 and 1,139.47 is: 1,709.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,605.45 : 5,408.71 = 1,139.47 : x
  2. Step 2: Convert to fraction form
    3,605.45/5,408.71 = 1,139.47/x
  3. Step 3: Cross multiply
    3,605.45x = 5,408.71 × 1,139.47
  4. Step 4: Simplify right side
    3,605.45x = 6,163,046.41
  5. Step 5: Solve for x
    x = 6,163,046.41/3,605.45
  6. Step 6: Final answer
    x = 1,709.37

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1.5x scale

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.