Home / 2,990.26-4,486.29-2,159.20

Finding the Fourth Proportional to 2,990.26, 4,486.29 and 2,159.20

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Solution

The fourth proportional to 2,990.26, 4,486.29 and 2,159.20 is: 3,239.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.26 : 4,486.29 = 2,159.20 : x
  2. Step 2: Convert to fraction form
    2,990.26/4,486.29 = 2,159.20/x
  3. Step 3: Cross multiply
    2,990.26x = 4,486.29 × 2,159.20
  4. Step 4: Simplify right side
    2,990.26x = 9,686,786.15
  5. Step 5: Solve for x
    x = 9,686,786.15/2,990.26
  6. Step 6: Final answer
    x = 3,239.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.