Home / 1,278.53-1,918.07-445.62

Finding the Fourth Proportional to 1,278.53, 1,918.07 and 445.62

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Solution

The fourth proportional to 1,278.53, 1,918.07 and 445.62 is: 668.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278.53 : 1,918.07 = 445.62 : x
  2. Step 2: Convert to fraction form
    1,278.53/1,918.07 = 445.62/x
  3. Step 3: Cross multiply
    1,278.53x = 1,918.07 × 445.62
  4. Step 4: Simplify right side
    1,278.53x = 854,731.47
  5. Step 5: Solve for x
    x = 854,731.47/1,278.53
  6. Step 6: Final answer
    x = 668.53

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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.