Home / 2,818.40-3,891.84-1,772.32

Finding the Fourth Proportional to 2,818.40, 3,891.84 and 1,772.32

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Solution

The fourth proportional to 2,818.40, 3,891.84 and 1,772.32 is: 2,447.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,818.40 : 3,891.84 = 1,772.32 : x
  2. Step 2: Convert to fraction form
    2,818.40/3,891.84 = 1,772.32/x
  3. Step 3: Cross multiply
    2,818.40x = 3,891.84 × 1,772.32
  4. Step 4: Simplify right side
    2,818.40x = 6,897,585.87
  5. Step 5: Solve for x
    x = 6,897,585.87/2,818.40
  6. Step 6: Final answer
    x = 2,447.34

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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.