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Finding the Fourth Proportional to 570.25, 786.81 and 321.52

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Solution

The fourth proportional to 570.25, 786.81 and 321.52 is: 443.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.25 : 786.81 = 321.52 : x
  2. Step 2: Convert to fraction form
    570.25/786.81 = 321.52/x
  3. Step 3: Cross multiply
    570.25x = 786.81 × 321.52
  4. Step 4: Simplify right side
    570.25x = 252,975.15
  5. Step 5: Solve for x
    x = 252,975.15/570.25
  6. Step 6: Final answer
    x = 443.62

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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.