Home / 2,990.42-4,127.09-1,731.44

Finding the Fourth Proportional to 2,990.42, 4,127.09 and 1,731.44

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Solution

The fourth proportional to 2,990.42, 4,127.09 and 1,731.44 is: 2,389.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.42 : 4,127.09 = 1,731.44 : x
  2. Step 2: Convert to fraction form
    2,990.42/4,127.09 = 1,731.44/x
  3. Step 3: Cross multiply
    2,990.42x = 4,127.09 × 1,731.44
  4. Step 4: Simplify right side
    2,990.42x = 7,145,810.37
  5. Step 5: Solve for x
    x = 7,145,810.37/2,990.42
  6. Step 6: Final answer
    x = 2,389.57

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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.