Home / 2,859.20-4,290.60-1,215.76

Finding the Fourth Proportional to 2,859.20, 4,290.60 and 1,215.76

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Solution

The fourth proportional to 2,859.20, 4,290.60 and 1,215.76 is: 1,824.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,859.20 : 4,290.60 = 1,215.76 : x
  2. Step 2: Convert to fraction form
    2,859.20/4,290.60 = 1,215.76/x
  3. Step 3: Cross multiply
    2,859.20x = 4,290.60 × 1,215.76
  4. Step 4: Simplify right side
    2,859.20x = 5,216,339.86
  5. Step 5: Solve for x
    x = 5,216,339.86/2,859.20
  6. Step 6: Final answer
    x = 1,824.41

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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.