Home / 2,987.75-4,123.07-1,661.57

Finding the Fourth Proportional to 2,987.75, 4,123.07 and 1,661.57

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Solution

The fourth proportional to 2,987.75, 4,123.07 and 1,661.57 is: 2,292.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.75 : 4,123.07 = 1,661.57 : x
  2. Step 2: Convert to fraction form
    2,987.75/4,123.07 = 1,661.57/x
  3. Step 3: Cross multiply
    2,987.75x = 4,123.07 × 1,661.57
  4. Step 4: Simplify right side
    2,987.75x = 6,850,761.11
  5. Step 5: Solve for x
    x = 6,850,761.11/2,987.75
  6. Step 6: Final answer
    x = 2,292.95

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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.