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Finding the Fourth Proportional to 3,126.78, 4,314.78 and 1,800.54

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Solution

The fourth proportional to 3,126.78, 4,314.78 and 1,800.54 is: 2,484.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,126.78 : 4,314.78 = 1,800.54 : x
  2. Step 2: Convert to fraction form
    3,126.78/4,314.78 = 1,800.54/x
  3. Step 3: Cross multiply
    3,126.78x = 4,314.78 × 1,800.54
  4. Step 4: Simplify right side
    3,126.78x = 7,768,933.98
  5. Step 5: Solve for x
    x = 7,768,933.98/3,126.78
  6. Step 6: Final answer
    x = 2,484.64

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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.