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Finding the Fourth Proportional to 1,889.90, 2,608.62 and 1,226.82

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Solution

The fourth proportional to 1,889.90, 2,608.62 and 1,226.82 is: 1,693.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,889.90 : 2,608.62 = 1,226.82 : x
  2. Step 2: Convert to fraction form
    1,889.90/2,608.62 = 1,226.82/x
  3. Step 3: Cross multiply
    1,889.90x = 2,608.62 × 1,226.82
  4. Step 4: Simplify right side
    1,889.90x = 3,200,307.19
  5. Step 5: Solve for x
    x = 3,200,307.19/1,889.90
  6. Step 6: Final answer
    x = 1,693.37

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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.