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Finding the Fourth Proportional to 955.31, 1,318.56 and 582.60

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Solution

The fourth proportional to 955.31, 1,318.56 and 582.60 is: 804.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.31 : 1,318.56 = 582.60 : x
  2. Step 2: Convert to fraction form
    955.31/1,318.56 = 582.60/x
  3. Step 3: Cross multiply
    955.31x = 1,318.56 × 582.60
  4. Step 4: Simplify right side
    955.31x = 768,193.06
  5. Step 5: Solve for x
    x = 768,193.06/955.31
  6. Step 6: Final answer
    x = 804.13

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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.