Home / 2,215.26-3,315.87-1,238.40

Finding the Fourth Proportional to 2,215.26, 3,315.87 and 1,238.40

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Solution

The fourth proportional to 2,215.26, 3,315.87 and 1,238.40 is: 1,853.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.26 : 3,315.87 = 1,238.40 : x
  2. Step 2: Convert to fraction form
    2,215.26/3,315.87 = 1,238.40/x
  3. Step 3: Cross multiply
    2,215.26x = 3,315.87 × 1,238.40
  4. Step 4: Simplify right side
    2,215.26x = 4,106,373.41
  5. Step 5: Solve for x
    x = 4,106,373.41/2,215.26
  6. Step 6: Final answer
    x = 1,853.68

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