Home / 3,261.78-4,894.80-1,209.78

Finding the Fourth Proportional to 3,261.78, 4,894.80 and 1,209.78

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Solution

The fourth proportional to 3,261.78, 4,894.80 and 1,209.78 is: 1,815.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,261.78 : 4,894.80 = 1,209.78 : x
  2. Step 2: Convert to fraction form
    3,261.78/4,894.80 = 1,209.78/x
  3. Step 3: Cross multiply
    3,261.78x = 4,894.80 × 1,209.78
  4. Step 4: Simplify right side
    3,261.78x = 5,921,631.14
  5. Step 5: Solve for x
    x = 5,921,631.14/3,261.78
  6. Step 6: Final answer
    x = 1,815.46

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1.5x scale

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.