Home / 3,143.80-4,712.61-1,389.76

Finding the Fourth Proportional to 3,143.80, 4,712.61 and 1,389.76

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Solution

The fourth proportional to 3,143.80, 4,712.61 and 1,389.76 is: 2,083.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,143.80 : 4,712.61 = 1,389.76 : x
  2. Step 2: Convert to fraction form
    3,143.80/4,712.61 = 1,389.76/x
  3. Step 3: Cross multiply
    3,143.80x = 4,712.61 × 1,389.76
  4. Step 4: Simplify right side
    3,143.80x = 6,549,396.87
  5. Step 5: Solve for x
    x = 6,549,396.87/3,143.80
  6. Step 6: Final answer
    x = 2,083.27

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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.