Home / 2,987.92-4,123.56-1,661.65

Finding the Fourth Proportional to 2,987.92, 4,123.56 and 1,661.65

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Solution

The fourth proportional to 2,987.92, 4,123.56 and 1,661.65 is: 2,293.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.92 : 4,123.56 = 1,661.65 : x
  2. Step 2: Convert to fraction form
    2,987.92/4,123.56 = 1,661.65/x
  3. Step 3: Cross multiply
    2,987.92x = 4,123.56 × 1,661.65
  4. Step 4: Simplify right side
    2,987.92x = 6,851,900.05
  5. Step 5: Solve for x
    x = 6,851,900.05/2,987.92
  6. Step 6: Final answer
    x = 2,293.20

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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.