Home / 3,128.68-4,317.60-1,731.43

Finding the Fourth Proportional to 3,128.68, 4,317.60 and 1,731.43

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Solution

The fourth proportional to 3,128.68, 4,317.60 and 1,731.43 is: 2,389.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.68 : 4,317.60 = 1,731.43 : x
  2. Step 2: Convert to fraction form
    3,128.68/4,317.60 = 1,731.43/x
  3. Step 3: Cross multiply
    3,128.68x = 4,317.60 × 1,731.43
  4. Step 4: Simplify right side
    3,128.68x = 7,475,622.17
  5. Step 5: Solve for x
    x = 7,475,622.17/3,128.68
  6. Step 6: Final answer
    x = 2,389.39

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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.