Home / 1,990.19-2,745.64-1,359.70

Finding the Fourth Proportional to 1,990.19, 2,745.64 and 1,359.70

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Solution

The fourth proportional to 1,990.19, 2,745.64 and 1,359.70 is: 1,875.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.19 : 2,745.64 = 1,359.70 : x
  2. Step 2: Convert to fraction form
    1,990.19/2,745.64 = 1,359.70/x
  3. Step 3: Cross multiply
    1,990.19x = 2,745.64 × 1,359.70
  4. Step 4: Simplify right side
    1,990.19x = 3,733,246.71
  5. Step 5: Solve for x
    x = 3,733,246.71/1,990.19
  6. Step 6: Final answer
    x = 1,875.83

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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.