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Finding the Fourth Proportional to 955.56, 1,323.65 and 936.12

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Solution

The fourth proportional to 955.56, 1,323.65 and 936.12 is: 1,296.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.56 : 1,323.65 = 936.12 : x
  2. Step 2: Convert to fraction form
    955.56/1,323.65 = 936.12/x
  3. Step 3: Cross multiply
    955.56x = 1,323.65 × 936.12
  4. Step 4: Simplify right side
    955.56x = 1,239,095.24
  5. Step 5: Solve for x
    x = 1,239,095.24/955.56
  6. Step 6: Final answer
    x = 1,296.72

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.