Home / 3,438.80-4,745.55-1,866.90

Finding the Fourth Proportional to 3,438.80, 4,745.55 and 1,866.90

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Solution

The fourth proportional to 3,438.80, 4,745.55 and 1,866.90 is: 2,576.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,438.80 : 4,745.55 = 1,866.90 : x
  2. Step 2: Convert to fraction form
    3,438.80/4,745.55 = 1,866.90/x
  3. Step 3: Cross multiply
    3,438.80x = 4,745.55 × 1,866.90
  4. Step 4: Simplify right side
    3,438.80x = 8,859,465.40
  5. Step 5: Solve for x
    x = 8,859,465.40/3,438.80
  6. Step 6: Final answer
    x = 2,576.32

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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.