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Finding the Fourth Proportional to 965.26, 1,448.09 and 388.18

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Solution

The fourth proportional to 965.26, 1,448.09 and 388.18 is: 582.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.26 : 1,448.09 = 388.18 : x
  2. Step 2: Convert to fraction form
    965.26/1,448.09 = 388.18/x
  3. Step 3: Cross multiply
    965.26x = 1,448.09 × 388.18
  4. Step 4: Simplify right side
    965.26x = 562,119.58
  5. Step 5: Solve for x
    x = 562,119.58/965.26
  6. Step 6: Final answer
    x = 582.35

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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.