Home / 3,139.66-4,706.80-1,289.62

Finding the Fourth Proportional to 3,139.66, 4,706.80 and 1,289.62

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Solution

The fourth proportional to 3,139.66, 4,706.80 and 1,289.62 is: 1,933.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.66 : 4,706.80 = 1,289.62 : x
  2. Step 2: Convert to fraction form
    3,139.66/4,706.80 = 1,289.62/x
  3. Step 3: Cross multiply
    3,139.66x = 4,706.80 × 1,289.62
  4. Step 4: Simplify right side
    3,139.66x = 6,069,983.42
  5. Step 5: Solve for x
    x = 6,069,983.42/3,139.66
  6. Step 6: Final answer
    x = 1,933.33

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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.