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Finding the Fourth Proportional to 325.99, 450.08 and 215.61

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Solution

The fourth proportional to 325.99, 450.08 and 215.61 is: 297.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.99 : 450.08 = 215.61 : x
  2. Step 2: Convert to fraction form
    325.99/450.08 = 215.61/x
  3. Step 3: Cross multiply
    325.99x = 450.08 × 215.61
  4. Step 4: Simplify right side
    325.99x = 97,041.75
  5. Step 5: Solve for x
    x = 97,041.75/325.99
  6. Step 6: Final answer
    x = 297.68

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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.