Home / 2,225.90-3,071.87-1,231.28

Finding the Fourth Proportional to 2,225.90, 3,071.87 and 1,231.28

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Solution

The fourth proportional to 2,225.90, 3,071.87 and 1,231.28 is: 1,699.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,225.90 : 3,071.87 = 1,231.28 : x
  2. Step 2: Convert to fraction form
    2,225.90/3,071.87 = 1,231.28/x
  3. Step 3: Cross multiply
    2,225.90x = 3,071.87 × 1,231.28
  4. Step 4: Simplify right side
    2,225.90x = 3,782,310.58
  5. Step 5: Solve for x
    x = 3,782,310.58/2,225.90
  6. Step 6: Final answer
    x = 1,699.23

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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.