Home / 1,278.53-1,918.34-700.73

Finding the Fourth Proportional to 1,278.53, 1,918.34 and 700.73

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Solution

The fourth proportional to 1,278.53, 1,918.34 and 700.73 is: 1,051.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278.53 : 1,918.34 = 700.73 : x
  2. Step 2: Convert to fraction form
    1,278.53/1,918.34 = 700.73/x
  3. Step 3: Cross multiply
    1,278.53x = 1,918.34 × 700.73
  4. Step 4: Simplify right side
    1,278.53x = 1,344,238.39
  5. Step 5: Solve for x
    x = 1,344,238.39/1,278.53
  6. Step 6: Final answer
    x = 1,051.39

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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.