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Finding the Fourth Proportional to 451.99, 678.04 and 328.97

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Solution

The fourth proportional to 451.99, 678.04 and 328.97 is: 493.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.99 : 678.04 = 328.97 : x
  2. Step 2: Convert to fraction form
    451.99/678.04 = 328.97/x
  3. Step 3: Cross multiply
    451.99x = 678.04 × 328.97
  4. Step 4: Simplify right side
    451.99x = 223,055.69
  5. Step 5: Solve for x
    x = 223,055.69/451.99
  6. Step 6: Final answer
    x = 493.50

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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.