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Finding the Fourth Proportional to 1,384.70, 2,072.19 and 1,074.58

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Solution

The fourth proportional to 1,384.70, 2,072.19 and 1,074.58 is: 1,608.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,384.70 : 2,072.19 = 1,074.58 : x
  2. Step 2: Convert to fraction form
    1,384.70/2,072.19 = 1,074.58/x
  3. Step 3: Cross multiply
    1,384.70x = 2,072.19 × 1,074.58
  4. Step 4: Simplify right side
    1,384.70x = 2,226,728.75
  5. Step 5: Solve for x
    x = 2,226,728.75/1,384.70
  6. Step 6: Final answer
    x = 1,608.09

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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.