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Finding the Fourth Proportional to 2,679.74, 4,020.07 and 1,219.01

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Solution

The fourth proportional to 2,679.74, 4,020.07 and 1,219.01 is: 1,828.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,679.74 : 4,020.07 = 1,219.01 : x
  2. Step 2: Convert to fraction form
    2,679.74/4,020.07 = 1,219.01/x
  3. Step 3: Cross multiply
    2,679.74x = 4,020.07 × 1,219.01
  4. Step 4: Simplify right side
    2,679.74x = 4,900,482.38
  5. Step 5: Solve for x
    x = 4,900,482.38/2,679.74
  6. Step 6: Final answer
    x = 1,828.72

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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.