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Finding the Fourth Proportional to 955.79, 1,318.51 and 605.87

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Solution

The fourth proportional to 955.79, 1,318.51 and 605.87 is: 835.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.79 : 1,318.51 = 605.87 : x
  2. Step 2: Convert to fraction form
    955.79/1,318.51 = 605.87/x
  3. Step 3: Cross multiply
    955.79x = 1,318.51 × 605.87
  4. Step 4: Simplify right side
    955.79x = 798,845.65
  5. Step 5: Solve for x
    x = 798,845.65/955.79
  6. Step 6: Final answer
    x = 835.80

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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.