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Finding the Fourth Proportional to 652.48, 978.73 and 213.73

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Solution

The fourth proportional to 652.48, 978.73 and 213.73 is: 320.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    652.48 : 978.73 = 213.73 : x
  2. Step 2: Convert to fraction form
    652.48/978.73 = 213.73/x
  3. Step 3: Cross multiply
    652.48x = 978.73 × 213.73
  4. Step 4: Simplify right side
    652.48x = 209,183.96
  5. Step 5: Solve for x
    x = 209,183.96/652.48
  6. Step 6: Final answer
    x = 320.60

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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.