Home / 2,818.20-3,888.90-1,698.87

Finding the Fourth Proportional to 2,818.20, 3,888.90 and 1,698.87

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Solution

The fourth proportional to 2,818.20, 3,888.90 and 1,698.87 is: 2,344.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,818.20 : 3,888.90 = 1,698.87 : x
  2. Step 2: Convert to fraction form
    2,818.20/3,888.90 = 1,698.87/x
  3. Step 3: Cross multiply
    2,818.20x = 3,888.90 × 1,698.87
  4. Step 4: Simplify right side
    2,818.20x = 6,606,735.54
  5. Step 5: Solve for x
    x = 6,606,735.54/2,818.20
  6. Step 6: Final answer
    x = 2,344.31

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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.