Home / 2,814.60-4,222.80-1,891.20

Finding the Fourth Proportional to 2,814.60, 4,222.80 and 1,891.20

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Solution

The fourth proportional to 2,814.60, 4,222.80 and 1,891.20 is: 2,837.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,814.60 : 4,222.80 = 1,891.20 : x
  2. Step 2: Convert to fraction form
    2,814.60/4,222.80 = 1,891.20/x
  3. Step 3: Cross multiply
    2,814.60x = 4,222.80 × 1,891.20
  4. Step 4: Simplify right side
    2,814.60x = 7,986,159.36
  5. Step 5: Solve for x
    x = 7,986,159.36/2,814.60
  6. Step 6: Final answer
    x = 2,837.40

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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.