Home / 1,071.21-1,478.33-629.24

Finding the Fourth Proportional to 1,071.21, 1,478.33 and 629.24

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Solution

The fourth proportional to 1,071.21, 1,478.33 and 629.24 is: 868.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,071.21 : 1,478.33 = 629.24 : x
  2. Step 2: Convert to fraction form
    1,071.21/1,478.33 = 629.24/x
  3. Step 3: Cross multiply
    1,071.21x = 1,478.33 × 629.24
  4. Step 4: Simplify right side
    1,071.21x = 930,224.37
  5. Step 5: Solve for x
    x = 930,224.37/1,071.21
  6. Step 6: Final answer
    x = 868.39

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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.