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Finding the Fourth Proportional to 570.03, 786.68 and 321.36

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Solution

The fourth proportional to 570.03, 786.68 and 321.36 is: 443.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.03 : 786.68 = 321.36 : x
  2. Step 2: Convert to fraction form
    570.03/786.68 = 321.36/x
  3. Step 3: Cross multiply
    570.03x = 786.68 × 321.36
  4. Step 4: Simplify right side
    570.03x = 252,805.88
  5. Step 5: Solve for x
    x = 252,805.88/570.03
  6. Step 6: Final answer
    x = 443.50

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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.