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Finding the Fourth Proportional to 955.92, 1,318.94 and 641.07

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Solution

The fourth proportional to 955.92, 1,318.94 and 641.07 is: 884.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.92 : 1,318.94 = 641.07 : x
  2. Step 2: Convert to fraction form
    955.92/1,318.94 = 641.07/x
  3. Step 3: Cross multiply
    955.92x = 1,318.94 × 641.07
  4. Step 4: Simplify right side
    955.92x = 845,532.87
  5. Step 5: Solve for x
    x = 845,532.87/955.92
  6. Step 6: Final answer
    x = 884.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.