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Finding the Fourth Proportional to 324.36, 487.89 and 294.30

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Solution

The fourth proportional to 324.36, 487.89 and 294.30 is: 442.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.36 : 487.89 = 294.30 : x
  2. Step 2: Convert to fraction form
    324.36/487.89 = 294.30/x
  3. Step 3: Cross multiply
    324.36x = 487.89 × 294.30
  4. Step 4: Simplify right side
    324.36x = 143,586.03
  5. Step 5: Solve for x
    x = 143,586.03/324.36
  6. Step 6: Final answer
    x = 442.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.