Home / 4,278.35-6,421.16-2,520.78

Finding the Fourth Proportional to 4,278.35, 6,421.16 and 2,520.78

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Solution

The fourth proportional to 4,278.35, 6,421.16 and 2,520.78 is: 3,783.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,278.35 : 6,421.16 = 2,520.78 : x
  2. Step 2: Convert to fraction form
    4,278.35/6,421.16 = 2,520.78/x
  3. Step 3: Cross multiply
    4,278.35x = 6,421.16 × 2,520.78
  4. Step 4: Simplify right side
    4,278.35x = 16,186,313.93
  5. Step 5: Solve for x
    x = 16,186,313.93/4,278.35
  6. Step 6: Final answer
    x = 3,783.31

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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.