Home / 3,981.65-5,975.21-1,384.58

Finding the Fourth Proportional to 3,981.65, 5,975.21 and 1,384.58

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Solution

The fourth proportional to 3,981.65, 5,975.21 and 1,384.58 is: 2,077.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981.65 : 5,975.21 = 1,384.58 : x
  2. Step 2: Convert to fraction form
    3,981.65/5,975.21 = 1,384.58/x
  3. Step 3: Cross multiply
    3,981.65x = 5,975.21 × 1,384.58
  4. Step 4: Simplify right side
    3,981.65x = 8,273,149.34
  5. Step 5: Solve for x
    x = 8,273,149.34/3,981.65
  6. Step 6: Final answer
    x = 2,077.82

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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.