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Finding the Fourth Proportional to 3,438.78, 4,745.49 and 1,866.84

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Solution

The fourth proportional to 3,438.78, 4,745.49 and 1,866.84 is: 2,576.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,438.78 : 4,745.49 = 1,866.84 : x
  2. Step 2: Convert to fraction form
    3,438.78/4,745.49 = 1,866.84/x
  3. Step 3: Cross multiply
    3,438.78x = 4,745.49 × 1,866.84
  4. Step 4: Simplify right side
    3,438.78x = 8,859,070.55
  5. Step 5: Solve for x
    x = 8,859,070.55/3,438.78
  6. Step 6: Final answer
    x = 2,576.22

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1.5x scale

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.