Home / 2,987.51-4,122.86-1,661.18

Finding the Fourth Proportional to 2,987.51, 4,122.86 and 1,661.18

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Solution

The fourth proportional to 2,987.51, 4,122.86 and 1,661.18 is: 2,292.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.51 : 4,122.86 = 1,661.18 : x
  2. Step 2: Convert to fraction form
    2,987.51/4,122.86 = 1,661.18/x
  3. Step 3: Cross multiply
    2,987.51x = 4,122.86 × 1,661.18
  4. Step 4: Simplify right side
    2,987.51x = 6,848,783.65
  5. Step 5: Solve for x
    x = 6,848,783.65/2,987.51
  6. Step 6: Final answer
    x = 2,292.48

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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.