Home / 2,163.75-2,987.33-1,665.45

Finding the Fourth Proportional to 2,163.75, 2,987.33 and 1,665.45

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Solution

The fourth proportional to 2,163.75, 2,987.33 and 1,665.45 is: 2,299.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,163.75 : 2,987.33 = 1,665.45 : x
  2. Step 2: Convert to fraction form
    2,163.75/2,987.33 = 1,665.45/x
  3. Step 3: Cross multiply
    2,163.75x = 2,987.33 × 1,665.45
  4. Step 4: Simplify right side
    2,163.75x = 4,975,240.42
  5. Step 5: Solve for x
    x = 4,975,240.42/2,163.75
  6. Step 6: Final answer
    x = 2,299.36

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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.