Home / 2,987.49-4,122.44-1,661.07

Finding the Fourth Proportional to 2,987.49, 4,122.44 and 1,661.07

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Solution

The fourth proportional to 2,987.49, 4,122.44 and 1,661.07 is: 2,292.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.49 : 4,122.44 = 1,661.07 : x
  2. Step 2: Convert to fraction form
    2,987.49/4,122.44 = 1,661.07/x
  3. Step 3: Cross multiply
    2,987.49x = 4,122.44 × 1,661.07
  4. Step 4: Simplify right side
    2,987.49x = 6,847,653.11
  5. Step 5: Solve for x
    x = 6,847,653.11/2,987.49
  6. Step 6: Final answer
    x = 2,292.11

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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.