Home / 3,603.81-5,405.34-1,138.65

Finding the Fourth Proportional to 3,603.81, 5,405.34 and 1,138.65

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Solution

The fourth proportional to 3,603.81, 5,405.34 and 1,138.65 is: 1,707.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,603.81 : 5,405.34 = 1,138.65 : x
  2. Step 2: Convert to fraction form
    3,603.81/5,405.34 = 1,138.65/x
  3. Step 3: Cross multiply
    3,603.81x = 5,405.34 × 1,138.65
  4. Step 4: Simplify right side
    3,603.81x = 6,154,790.39
  5. Step 5: Solve for x
    x = 6,154,790.39/3,603.81
  6. Step 6: Final answer
    x = 1,707.86

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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.