Home / 2,990.29-4,121.28-2,646.58

Finding the Fourth Proportional to 2,990.29, 4,121.28 and 2,646.58

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Solution

The fourth proportional to 2,990.29, 4,121.28 and 2,646.58 is: 3,647.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.29 : 4,121.28 = 2,646.58 : x
  2. Step 2: Convert to fraction form
    2,990.29/4,121.28 = 2,646.58/x
  3. Step 3: Cross multiply
    2,990.29x = 4,121.28 × 2,646.58
  4. Step 4: Simplify right side
    2,990.29x = 10,907,286.92
  5. Step 5: Solve for x
    x = 10,907,286.92/2,990.29
  6. Step 6: Final answer
    x = 3,647.57

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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.