Home / 3,640.90-5,465.40-1,997.50

Finding the Fourth Proportional to 3,640.90, 5,465.40 and 1,997.50

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Solution

The fourth proportional to 3,640.90, 5,465.40 and 1,997.50 is: 2,998.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,640.90 : 5,465.40 = 1,997.50 : x
  2. Step 2: Convert to fraction form
    3,640.90/5,465.40 = 1,997.50/x
  3. Step 3: Cross multiply
    3,640.90x = 5,465.40 × 1,997.50
  4. Step 4: Simplify right side
    3,640.90x = 10,917,136.50
  5. Step 5: Solve for x
    x = 10,917,136.50/3,640.90
  6. Step 6: Final answer
    x = 2,998.47

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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.