Home / 1,615.40-2,229.30-1,025.80

Finding the Fourth Proportional to 1,615.40, 2,229.30 and 1,025.80

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Solution

The fourth proportional to 1,615.40, 2,229.30 and 1,025.80 is: 1,415.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,615.40 : 2,229.30 = 1,025.80 : x
  2. Step 2: Convert to fraction form
    1,615.40/2,229.30 = 1,025.80/x
  3. Step 3: Cross multiply
    1,615.40x = 2,229.30 × 1,025.80
  4. Step 4: Simplify right side
    1,615.40x = 2,286,815.94
  5. Step 5: Solve for x
    x = 2,286,815.94/1,615.40
  6. Step 6: Final answer
    x = 1,415.63

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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.