Home / 1,991.19-2,980.62-1,695.95

Finding the Fourth Proportional to 1,991.19, 2,980.62 and 1,695.95

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Solution

The fourth proportional to 1,991.19, 2,980.62 and 1,695.95 is: 2,538.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.19 : 2,980.62 = 1,695.95 : x
  2. Step 2: Convert to fraction form
    1,991.19/2,980.62 = 1,695.95/x
  3. Step 3: Cross multiply
    1,991.19x = 2,980.62 × 1,695.95
  4. Step 4: Simplify right side
    1,991.19x = 5,054,967.59
  5. Step 5: Solve for x
    x = 5,054,967.59/1,991.19
  6. Step 6: Final answer
    x = 2,538.67

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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.