Home / 2,987.55-4,122.72-1,661.23

Finding the Fourth Proportional to 2,987.55, 4,122.72 and 1,661.23

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Solution

The fourth proportional to 2,987.55, 4,122.72 and 1,661.23 is: 2,292.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.55 : 4,122.72 = 1,661.23 : x
  2. Step 2: Convert to fraction form
    2,987.55/4,122.72 = 1,661.23/x
  3. Step 3: Cross multiply
    2,987.55x = 4,122.72 × 1,661.23
  4. Step 4: Simplify right side
    2,987.55x = 6,848,757.23
  5. Step 5: Solve for x
    x = 6,848,757.23/2,987.55
  6. Step 6: Final answer
    x = 2,292.43

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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.