Home / 2,987.99-4,123.53-1,661.75

Finding the Fourth Proportional to 2,987.99, 4,123.53 and 1,661.75

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Solution

The fourth proportional to 2,987.99, 4,123.53 and 1,661.75 is: 2,293.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.99 : 4,123.53 = 1,661.75 : x
  2. Step 2: Convert to fraction form
    2,987.99/4,123.53 = 1,661.75/x
  3. Step 3: Cross multiply
    2,987.99x = 4,123.53 × 1,661.75
  4. Step 4: Simplify right side
    2,987.99x = 6,852,275.98
  5. Step 5: Solve for x
    x = 6,852,275.98/2,987.99
  6. Step 6: Final answer
    x = 2,293.27

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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.