Home / 2,987.88-4,123.15-1,661.55

Finding the Fourth Proportional to 2,987.88, 4,123.15 and 1,661.55

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Solution

The fourth proportional to 2,987.88, 4,123.15 and 1,661.55 is: 2,292.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.88 : 4,123.15 = 1,661.55 : x
  2. Step 2: Convert to fraction form
    2,987.88/4,123.15 = 1,661.55/x
  3. Step 3: Cross multiply
    2,987.88x = 4,123.15 × 1,661.55
  4. Step 4: Simplify right side
    2,987.88x = 6,850,819.88
  5. Step 5: Solve for x
    x = 6,850,819.88/2,987.88
  6. Step 6: Final answer
    x = 2,292.87

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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.