Home / 3,189.34-4,391.31-2,897.74

Finding the Fourth Proportional to 3,189.34, 4,391.31 and 2,897.74

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Solution

The fourth proportional to 3,189.34, 4,391.31 and 2,897.74 is: 3,989.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,189.34 : 4,391.31 = 2,897.74 : x
  2. Step 2: Convert to fraction form
    3,189.34/4,391.31 = 2,897.74/x
  3. Step 3: Cross multiply
    3,189.34x = 4,391.31 × 2,897.74
  4. Step 4: Simplify right side
    3,189.34x = 12,724,874.64
  5. Step 5: Solve for x
    x = 12,724,874.64/3,189.34
  6. Step 6: Final answer
    x = 3,989.81

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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.