Home / 2,520.63-3,478.68-1,401.78

Finding the Fourth Proportional to 2,520.63, 3,478.68 and 1,401.78

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Solution

The fourth proportional to 2,520.63, 3,478.68 and 1,401.78 is: 1,934.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,520.63 : 3,478.68 = 1,401.78 : x
  2. Step 2: Convert to fraction form
    2,520.63/3,478.68 = 1,401.78/x
  3. Step 3: Cross multiply
    2,520.63x = 3,478.68 × 1,401.78
  4. Step 4: Simplify right side
    2,520.63x = 4,876,344.05
  5. Step 5: Solve for x
    x = 4,876,344.05/2,520.63
  6. Step 6: Final answer
    x = 1,934.57

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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.