Home / 2,211.08-3,320.85-1,391

Finding the Fourth Proportional to 2,211.08, 3,320.85 and 1,391

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Solution

The fourth proportional to 2,211.08, 3,320.85 and 1,391 is: 2,089.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,211.08 : 3,320.85 = 1,391 : x
  2. Step 2: Convert to fraction form
    2,211.08/3,320.85 = 1,391/x
  3. Step 3: Cross multiply
    2,211.08x = 3,320.85 × 1,391
  4. Step 4: Simplify right side
    2,211.08x = 4,619,302.35
  5. Step 5: Solve for x
    x = 4,619,302.35/2,211.08
  6. Step 6: Final answer
    x = 2,089.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.