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Finding the Fourth Proportional to 965.66, 1,448.75 and 418.23

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Solution

The fourth proportional to 965.66, 1,448.75 and 418.23 is: 627.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.66 : 1,448.75 = 418.23 : x
  2. Step 2: Convert to fraction form
    965.66/1,448.75 = 418.23/x
  3. Step 3: Cross multiply
    965.66x = 1,448.75 × 418.23
  4. Step 4: Simplify right side
    965.66x = 605,908.62
  5. Step 5: Solve for x
    x = 605,908.62/965.66
  6. Step 6: Final answer
    x = 627.45

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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.