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Finding the Fourth Proportional to 965.48, 1,448.73 and 913.21

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Solution

The fourth proportional to 965.48, 1,448.73 and 913.21 is: 1,370.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.48 : 1,448.73 = 913.21 : x
  2. Step 2: Convert to fraction form
    965.48/1,448.73 = 913.21/x
  3. Step 3: Cross multiply
    965.48x = 1,448.73 × 913.21
  4. Step 4: Simplify right side
    965.48x = 1,322,991.10
  5. Step 5: Solve for x
    x = 1,322,991.10/965.48
  6. Step 6: Final answer
    x = 1,370.30

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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.