Home / 1,880.81-2,821.31-1,188.06

Finding the Fourth Proportional to 1,880.81, 2,821.31 and 1,188.06

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Solution

The fourth proportional to 1,880.81, 2,821.31 and 1,188.06 is: 1,782.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,880.81 : 2,821.31 = 1,188.06 : x
  2. Step 2: Convert to fraction form
    1,880.81/2,821.31 = 1,188.06/x
  3. Step 3: Cross multiply
    1,880.81x = 2,821.31 × 1,188.06
  4. Step 4: Simplify right side
    1,880.81x = 3,351,885.56
  5. Step 5: Solve for x
    x = 3,351,885.56/1,880.81
  6. Step 6: Final answer
    x = 1,782.15

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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.