Home / 1,678.19-2,517.29-445.61

Finding the Fourth Proportional to 1,678.19, 2,517.29 and 445.61

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Solution

The fourth proportional to 1,678.19, 2,517.29 and 445.61 is: 668.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,678.19 : 2,517.29 = 445.61 : x
  2. Step 2: Convert to fraction form
    1,678.19/2,517.29 = 445.61/x
  3. Step 3: Cross multiply
    1,678.19x = 2,517.29 × 445.61
  4. Step 4: Simplify right side
    1,678.19x = 1,121,714.78
  5. Step 5: Solve for x
    x = 1,121,714.78/1,678.19
  6. Step 6: Final answer
    x = 668.41

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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.