Home / 3,145.20-4,712.40-1,682.88

Finding the Fourth Proportional to 3,145.20, 4,712.40 and 1,682.88

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Solution

The fourth proportional to 3,145.20, 4,712.40 and 1,682.88 is: 2,521.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145.20 : 4,712.40 = 1,682.88 : x
  2. Step 2: Convert to fraction form
    3,145.20/4,712.40 = 1,682.88/x
  3. Step 3: Cross multiply
    3,145.20x = 4,712.40 × 1,682.88
  4. Step 4: Simplify right side
    3,145.20x = 7,930,403.71
  5. Step 5: Solve for x
    x = 7,930,403.71/3,145.20
  6. Step 6: Final answer
    x = 2,521.43

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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.