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Finding the Fourth Proportional to 367.56, 507.78 and 321.12

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Solution

The fourth proportional to 367.56, 507.78 and 321.12 is: 443.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    367.56 : 507.78 = 321.12 : x
  2. Step 2: Convert to fraction form
    367.56/507.78 = 321.12/x
  3. Step 3: Cross multiply
    367.56x = 507.78 × 321.12
  4. Step 4: Simplify right side
    367.56x = 163,058.31
  5. Step 5: Solve for x
    x = 163,058.31/367.56
  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.