Home / 3,438.90-5,158.72-1,129.86

Finding the Fourth Proportional to 3,438.90, 5,158.72 and 1,129.86

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Solution

The fourth proportional to 3,438.90, 5,158.72 and 1,129.86 is: 1,694.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,438.90 : 5,158.72 = 1,129.86 : x
  2. Step 2: Convert to fraction form
    3,438.90/5,158.72 = 1,129.86/x
  3. Step 3: Cross multiply
    3,438.90x = 5,158.72 × 1,129.86
  4. Step 4: Simplify right side
    3,438.90x = 5,828,631.38
  5. Step 5: Solve for x
    x = 5,828,631.38/3,438.90
  6. Step 6: Final answer
    x = 1,694.91

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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.