Home / 1,286.73-1,775.52-1,242.45

Finding the Fourth Proportional to 1,286.73, 1,775.52 and 1,242.45

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Solution

The fourth proportional to 1,286.73, 1,775.52 and 1,242.45 is: 1,714.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,286.73 : 1,775.52 = 1,242.45 : x
  2. Step 2: Convert to fraction form
    1,286.73/1,775.52 = 1,242.45/x
  3. Step 3: Cross multiply
    1,286.73x = 1,775.52 × 1,242.45
  4. Step 4: Simplify right side
    1,286.73x = 2,205,994.82
  5. Step 5: Solve for x
    x = 2,205,994.82/1,286.73
  6. Step 6: Final answer
    x = 1,714.42

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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.