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Finding the Fourth Proportional to 2,805.78, 4,208.70 and 1,074

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Solution

The fourth proportional to 2,805.78, 4,208.70 and 1,074 is: 1,611.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,805.78 : 4,208.70 = 1,074 : x
  2. Step 2: Convert to fraction form
    2,805.78/4,208.70 = 1,074/x
  3. Step 3: Cross multiply
    2,805.78x = 4,208.70 × 1,074
  4. Step 4: Simplify right side
    2,805.78x = 4,520,143.80
  5. Step 5: Solve for x
    x = 4,520,143.80/2,805.78
  6. Step 6: Final answer
    x = 1,611.01

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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.