Home / 3,485.78-5,227.37-1,405.08

Finding the Fourth Proportional to 3,485.78, 5,227.37 and 1,405.08

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Solution

The fourth proportional to 3,485.78, 5,227.37 and 1,405.08 is: 2,107.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,485.78 : 5,227.37 = 1,405.08 : x
  2. Step 2: Convert to fraction form
    3,485.78/5,227.37 = 1,405.08/x
  3. Step 3: Cross multiply
    3,485.78x = 5,227.37 × 1,405.08
  4. Step 4: Simplify right side
    3,485.78x = 7,344,871.28
  5. Step 5: Solve for x
    x = 7,344,871.28/3,485.78
  6. Step 6: Final answer
    x = 2,107.10

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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.