Home / 2,988.09-4,123.55-1,661.79

Finding the Fourth Proportional to 2,988.09, 4,123.55 and 1,661.79

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Solution

The fourth proportional to 2,988.09, 4,123.55 and 1,661.79 is: 2,293.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,988.09 : 4,123.55 = 1,661.79 : x
  2. Step 2: Convert to fraction form
    2,988.09/4,123.55 = 1,661.79/x
  3. Step 3: Cross multiply
    2,988.09x = 4,123.55 × 1,661.79
  4. Step 4: Simplify right side
    2,988.09x = 6,852,465.85
  5. Step 5: Solve for x
    x = 6,852,465.85/2,988.09
  6. Step 6: Final answer
    x = 2,293.26

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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.