Home / 1,980.21-2,728.17-1,586.55

Finding the Fourth Proportional to 1,980.21, 2,728.17 and 1,586.55

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Solution

The fourth proportional to 1,980.21, 2,728.17 and 1,586.55 is: 2,185.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,980.21 : 2,728.17 = 1,586.55 : x
  2. Step 2: Convert to fraction form
    1,980.21/2,728.17 = 1,586.55/x
  3. Step 3: Cross multiply
    1,980.21x = 2,728.17 × 1,586.55
  4. Step 4: Simplify right side
    1,980.21x = 4,328,378.11
  5. Step 5: Solve for x
    x = 4,328,378.11/1,980.21
  6. Step 6: Final answer
    x = 2,185.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.