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Finding the Fourth Proportional to 965.43, 1,448.42 and 503.55

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Solution

The fourth proportional to 965.43, 1,448.42 and 503.55 is: 755.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.43 : 1,448.42 = 503.55 : x
  2. Step 2: Convert to fraction form
    965.43/1,448.42 = 503.55/x
  3. Step 3: Cross multiply
    965.43x = 1,448.42 × 503.55
  4. Step 4: Simplify right side
    965.43x = 729,349.37
  5. Step 5: Solve for x
    x = 729,349.37/965.43
  6. Step 6: Final answer
    x = 755.47

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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.