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Finding the Fourth Proportional to 957.33, 1,321.11 and 559.26

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Solution

The fourth proportional to 957.33, 1,321.11 and 559.26 is: 771.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.33 : 1,321.11 = 559.26 : x
  2. Step 2: Convert to fraction form
    957.33/1,321.11 = 559.26/x
  3. Step 3: Cross multiply
    957.33x = 1,321.11 × 559.26
  4. Step 4: Simplify right side
    957.33x = 738,848.93
  5. Step 5: Solve for x
    x = 738,848.93/957.33
  6. Step 6: Final answer
    x = 771.78

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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.