Home / 1,992.18-2,990.70-1,856.10

Finding the Fourth Proportional to 1,992.18, 2,990.70 and 1,856.10

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Solution

The fourth proportional to 1,992.18, 2,990.70 and 1,856.10 is: 2,786.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,992.18 : 2,990.70 = 1,856.10 : x
  2. Step 2: Convert to fraction form
    1,992.18/2,990.70 = 1,856.10/x
  3. Step 3: Cross multiply
    1,992.18x = 2,990.70 × 1,856.10
  4. Step 4: Simplify right side
    1,992.18x = 5,551,038.27
  5. Step 5: Solve for x
    x = 5,551,038.27/1,992.18
  6. Step 6: Final answer
    x = 2,786.41

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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.