Home / 3,128.88-4,317.60-1,731.60

Finding the Fourth Proportional to 3,128.88, 4,317.60 and 1,731.60

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Solution

The fourth proportional to 3,128.88, 4,317.60 and 1,731.60 is: 2,389.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.88 : 4,317.60 = 1,731.60 : x
  2. Step 2: Convert to fraction form
    3,128.88/4,317.60 = 1,731.60/x
  3. Step 3: Cross multiply
    3,128.88x = 4,317.60 × 1,731.60
  4. Step 4: Simplify right side
    3,128.88x = 7,476,356.16
  5. Step 5: Solve for x
    x = 7,476,356.16/3,128.88
  6. Step 6: Final answer
    x = 2,389.47

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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.