Home / 3,975.72-5,485.90-2,207.32

Finding the Fourth Proportional to 3,975.72, 5,485.90 and 2,207.32

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Solution

The fourth proportional to 3,975.72, 5,485.90 and 2,207.32 is: 3,045.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,975.72 : 5,485.90 = 2,207.32 : x
  2. Step 2: Convert to fraction form
    3,975.72/5,485.90 = 2,207.32/x
  3. Step 3: Cross multiply
    3,975.72x = 5,485.90 × 2,207.32
  4. Step 4: Simplify right side
    3,975.72x = 12,109,136.79
  5. Step 5: Solve for x
    x = 12,109,136.79/3,975.72
  6. Step 6: Final answer
    x = 3,045.77

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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.