Home / 3,255.21-4,492.28-1,911.78

Finding the Fourth Proportional to 3,255.21, 4,492.28 and 1,911.78

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Solution

The fourth proportional to 3,255.21, 4,492.28 and 1,911.78 is: 2,638.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,255.21 : 4,492.28 = 1,911.78 : x
  2. Step 2: Convert to fraction form
    3,255.21/4,492.28 = 1,911.78/x
  3. Step 3: Cross multiply
    3,255.21x = 4,492.28 × 1,911.78
  4. Step 4: Simplify right side
    3,255.21x = 8,588,241.50
  5. Step 5: Solve for x
    x = 8,588,241.50/3,255.21
  6. Step 6: Final answer
    x = 2,638.31

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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.