Home / 1,990.91-2,747.75-1,433.22

Finding the Fourth Proportional to 1,990.91, 2,747.75 and 1,433.22

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Solution

The fourth proportional to 1,990.91, 2,747.75 and 1,433.22 is: 1,978.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.91 : 2,747.75 = 1,433.22 : x
  2. Step 2: Convert to fraction form
    1,990.91/2,747.75 = 1,433.22/x
  3. Step 3: Cross multiply
    1,990.91x = 2,747.75 × 1,433.22
  4. Step 4: Simplify right side
    1,990.91x = 3,938,130.26
  5. Step 5: Solve for x
    x = 3,938,130.26/1,990.91
  6. Step 6: Final answer
    x = 1,978.06

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1.5x scale

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.