Home / 3,981.42-5,970.78-1,384.02

Finding the Fourth Proportional to 3,981.42, 5,970.78 and 1,384.02

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Solution

The fourth proportional to 3,981.42, 5,970.78 and 1,384.02 is: 2,075.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981.42 : 5,970.78 = 1,384.02 : x
  2. Step 2: Convert to fraction form
    3,981.42/5,970.78 = 1,384.02/x
  3. Step 3: Cross multiply
    3,981.42x = 5,970.78 × 1,384.02
  4. Step 4: Simplify right side
    3,981.42x = 8,263,678.94
  5. Step 5: Solve for x
    x = 8,263,678.94/3,981.42
  6. Step 6: Final answer
    x = 2,075.56

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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.