Home / 3,389.94-4,675.40-2,145.78

Finding the Fourth Proportional to 3,389.94, 4,675.40 and 2,145.78

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Solution

The fourth proportional to 3,389.94, 4,675.40 and 2,145.78 is: 2,959.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,389.94 : 4,675.40 = 2,145.78 : x
  2. Step 2: Convert to fraction form
    3,389.94/4,675.40 = 2,145.78/x
  3. Step 3: Cross multiply
    3,389.94x = 4,675.40 × 2,145.78
  4. Step 4: Simplify right side
    3,389.94x = 10,032,379.81
  5. Step 5: Solve for x
    x = 10,032,379.81/3,389.94
  6. Step 6: Final answer
    x = 2,959.46

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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.