Home / 3,623.80-5,435.70-1,431.40

Finding the Fourth Proportional to 3,623.80, 5,435.70 and 1,431.40

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Solution

The fourth proportional to 3,623.80, 5,435.70 and 1,431.40 is: 2,147.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,623.80 : 5,435.70 = 1,431.40 : x
  2. Step 2: Convert to fraction form
    3,623.80/5,435.70 = 1,431.40/x
  3. Step 3: Cross multiply
    3,623.80x = 5,435.70 × 1,431.40
  4. Step 4: Simplify right side
    3,623.80x = 7,780,660.98
  5. Step 5: Solve for x
    x = 7,780,660.98/3,623.80
  6. Step 6: Final answer
    x = 2,147.10

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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.