Home / 3,121-4,307.25-1,724.02

Finding the Fourth Proportional to 3,121, 4,307.25 and 1,724.02

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Solution

The fourth proportional to 3,121, 4,307.25 and 1,724.02 is: 2,379.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121 : 4,307.25 = 1,724.02 : x
  2. Step 2: Convert to fraction form
    3,121/4,307.25 = 1,724.02/x
  3. Step 3: Cross multiply
    3,121x = 4,307.25 × 1,724.02
  4. Step 4: Simplify right side
    3,121x = 7,425,785.15
  5. Step 5: Solve for x
    x = 7,425,785.15/3,121
  6. Step 6: Final answer
    x = 2,379.30

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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.