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Finding the Fourth Proportional to 2,419, 3,338.22 and 1,315

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Solution

The fourth proportional to 2,419, 3,338.22 and 1,315 is: 1,814.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,419 : 3,338.22 = 1,315 : x
  2. Step 2: Convert to fraction form
    2,419/3,338.22 = 1,315/x
  3. Step 3: Cross multiply
    2,419x = 3,338.22 × 1,315
  4. Step 4: Simplify right side
    2,419x = 4,389,759.30
  5. Step 5: Solve for x
    x = 4,389,759.30/2,419
  6. Step 6: Final answer
    x = 1,814.70

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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.