Home / 2,990.44-4,127.31-1,731.28

Finding the Fourth Proportional to 2,990.44, 4,127.31 and 1,731.28

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Solution

The fourth proportional to 2,990.44, 4,127.31 and 1,731.28 is: 2,389.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.44 : 4,127.31 = 1,731.28 : x
  2. Step 2: Convert to fraction form
    2,990.44/4,127.31 = 1,731.28/x
  3. Step 3: Cross multiply
    2,990.44x = 4,127.31 × 1,731.28
  4. Step 4: Simplify right side
    2,990.44x = 7,145,529.26
  5. Step 5: Solve for x
    x = 7,145,529.26/2,990.44
  6. Step 6: Final answer
    x = 2,389.46

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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.