Home / 1,072.26-1,479.35-629.87

Finding the Fourth Proportional to 1,072.26, 1,479.35 and 629.87

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Solution

The fourth proportional to 1,072.26, 1,479.35 and 629.87 is: 868.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,072.26 : 1,479.35 = 629.87 : x
  2. Step 2: Convert to fraction form
    1,072.26/1,479.35 = 629.87/x
  3. Step 3: Cross multiply
    1,072.26x = 1,479.35 × 629.87
  4. Step 4: Simplify right side
    1,072.26x = 931,787.64
  5. Step 5: Solve for x
    x = 931,787.64/1,072.26
  6. Step 6: Final answer
    x = 868.99

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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.