Home / 3,438.69-5,158.81-1,247.42

Finding the Fourth Proportional to 3,438.69, 5,158.81 and 1,247.42

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Solution

The fourth proportional to 3,438.69, 5,158.81 and 1,247.42 is: 1,871.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,438.69 : 5,158.81 = 1,247.42 : x
  2. Step 2: Convert to fraction form
    3,438.69/5,158.81 = 1,247.42/x
  3. Step 3: Cross multiply
    3,438.69x = 5,158.81 × 1,247.42
  4. Step 4: Simplify right side
    3,438.69x = 6,435,178.54
  5. Step 5: Solve for x
    x = 6,435,178.54/3,438.69
  6. Step 6: Final answer
    x = 1,871.40

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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.