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Finding the Fourth Proportional to 955.39, 1,318.49 and 535.75

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Solution

The fourth proportional to 955.39, 1,318.49 and 535.75 is: 739.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.39 : 1,318.49 = 535.75 : x
  2. Step 2: Convert to fraction form
    955.39/1,318.49 = 535.75/x
  3. Step 3: Cross multiply
    955.39x = 1,318.49 × 535.75
  4. Step 4: Simplify right side
    955.39x = 706,381.02
  5. Step 5: Solve for x
    x = 706,381.02/955.39
  6. Step 6: Final answer
    x = 739.36

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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.