Home / 3,128.90-4,694.22-1,049.40

Finding the Fourth Proportional to 3,128.90, 4,694.22 and 1,049.40

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Solution

The fourth proportional to 3,128.90, 4,694.22 and 1,049.40 is: 1,574.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.90 : 4,694.22 = 1,049.40 : x
  2. Step 2: Convert to fraction form
    3,128.90/4,694.22 = 1,049.40/x
  3. Step 3: Cross multiply
    3,128.90x = 4,694.22 × 1,049.40
  4. Step 4: Simplify right side
    3,128.90x = 4,926,114.47
  5. Step 5: Solve for x
    x = 4,926,114.47/3,128.90
  6. Step 6: Final answer
    x = 1,574.39

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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.