Home / 1,278.17-1,917.44-445.37

Finding the Fourth Proportional to 1,278.17, 1,917.44 and 445.37

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Solution

The fourth proportional to 1,278.17, 1,917.44 and 445.37 is: 668.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278.17 : 1,917.44 = 445.37 : x
  2. Step 2: Convert to fraction form
    1,278.17/1,917.44 = 445.37/x
  3. Step 3: Cross multiply
    1,278.17x = 1,917.44 × 445.37
  4. Step 4: Simplify right side
    1,278.17x = 853,960.11
  5. Step 5: Solve for x
    x = 853,960.11/1,278.17
  6. Step 6: Final answer
    x = 668.11

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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.