Home / 1,990.08-2,985.61-1,406.23

Finding the Fourth Proportional to 1,990.08, 2,985.61 and 1,406.23

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Solution

The fourth proportional to 1,990.08, 2,985.61 and 1,406.23 is: 2,109.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.08 : 2,985.61 = 1,406.23 : x
  2. Step 2: Convert to fraction form
    1,990.08/2,985.61 = 1,406.23/x
  3. Step 3: Cross multiply
    1,990.08x = 2,985.61 × 1,406.23
  4. Step 4: Simplify right side
    1,990.08x = 4,198,454.35
  5. Step 5: Solve for x
    x = 4,198,454.35/1,990.08
  6. Step 6: Final answer
    x = 2,109.69

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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.