Home / 1,072.08-1,479.38-629.92

Finding the Fourth Proportional to 1,072.08, 1,479.38 and 629.92

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Solution

The fourth proportional to 1,072.08, 1,479.38 and 629.92 is: 869.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,072.08 : 1,479.38 = 629.92 : x
  2. Step 2: Convert to fraction form
    1,072.08/1,479.38 = 629.92/x
  3. Step 3: Cross multiply
    1,072.08x = 1,479.38 × 629.92
  4. Step 4: Simplify right side
    1,072.08x = 931,891.05
  5. Step 5: Solve for x
    x = 931,891.05/1,072.08
  6. Step 6: Final answer
    x = 869.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.