Home / 1,678.17-2,517.38-445.55

Finding the Fourth Proportional to 1,678.17, 2,517.38 and 445.55

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Solution

The fourth proportional to 1,678.17, 2,517.38 and 445.55 is: 668.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,678.17 : 2,517.38 = 445.55 : x
  2. Step 2: Convert to fraction form
    1,678.17/2,517.38 = 445.55/x
  3. Step 3: Cross multiply
    1,678.17x = 2,517.38 × 445.55
  4. Step 4: Simplify right side
    1,678.17x = 1,121,619.68
  5. Step 5: Solve for x
    x = 1,121,619.68/1,678.17
  6. Step 6: Final answer
    x = 668.36

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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.