Home / 3,138.30-4,707.12-1,289.61

Finding the Fourth Proportional to 3,138.30, 4,707.12 and 1,289.61

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Solution

The fourth proportional to 3,138.30, 4,707.12 and 1,289.61 is: 1,934.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.30 : 4,707.12 = 1,289.61 : x
  2. Step 2: Convert to fraction form
    3,138.30/4,707.12 = 1,289.61/x
  3. Step 3: Cross multiply
    3,138.30x = 4,707.12 × 1,289.61
  4. Step 4: Simplify right side
    3,138.30x = 6,070,349.02
  5. Step 5: Solve for x
    x = 6,070,349.02/3,138.30
  6. Step 6: Final answer
    x = 1,934.28

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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.