Home / 3,221.16-4,438.98-2,171.40

Finding the Fourth Proportional to 3,221.16, 4,438.98 and 2,171.40

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Solution

The fourth proportional to 3,221.16, 4,438.98 and 2,171.40 is: 2,992.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,221.16 : 4,438.98 = 2,171.40 : x
  2. Step 2: Convert to fraction form
    3,221.16/4,438.98 = 2,171.40/x
  3. Step 3: Cross multiply
    3,221.16x = 4,438.98 × 2,171.40
  4. Step 4: Simplify right side
    3,221.16x = 9,638,801.17
  5. Step 5: Solve for x
    x = 9,638,801.17/3,221.16
  6. Step 6: Final answer
    x = 2,992.34

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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.