Home / 3,121.89-4,308.64-1,795.57

Finding the Fourth Proportional to 3,121.89, 4,308.64 and 1,795.57

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Solution

The fourth proportional to 3,121.89, 4,308.64 and 1,795.57 is: 2,478.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.89 : 4,308.64 = 1,795.57 : x
  2. Step 2: Convert to fraction form
    3,121.89/4,308.64 = 1,795.57/x
  3. Step 3: Cross multiply
    3,121.89x = 4,308.64 × 1,795.57
  4. Step 4: Simplify right side
    3,121.89x = 7,736,464.72
  5. Step 5: Solve for x
    x = 7,736,464.72/3,121.89
  6. Step 6: Final answer
    x = 2,478.13

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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.