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Finding the Fourth Proportional to 936.48, 1,395.56 and 905.52

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Solution

The fourth proportional to 936.48, 1,395.56 and 905.52 is: 1,349.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.48 : 1,395.56 = 905.52 : x
  2. Step 2: Convert to fraction form
    936.48/1,395.56 = 905.52/x
  3. Step 3: Cross multiply
    936.48x = 1,395.56 × 905.52
  4. Step 4: Simplify right side
    936.48x = 1,263,707.49
  5. Step 5: Solve for x
    x = 1,263,707.49/936.48
  6. Step 6: Final answer
    x = 1,349.42

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.