Home / 4,278.90-6,422.34-2,638.62

Finding the Fourth Proportional to 4,278.90, 6,422.34 and 2,638.62

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Solution

The fourth proportional to 4,278.90, 6,422.34 and 2,638.62 is: 3,960.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,278.90 : 6,422.34 = 2,638.62 : x
  2. Step 2: Convert to fraction form
    4,278.90/6,422.34 = 2,638.62/x
  3. Step 3: Cross multiply
    4,278.90x = 6,422.34 × 2,638.62
  4. Step 4: Simplify right side
    4,278.90x = 16,946,114.77
  5. Step 5: Solve for x
    x = 16,946,114.77/4,278.90
  6. Step 6: Final answer
    x = 3,960.39

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1.5x scale

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.