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Finding the Fourth Proportional to 450.68, 674.64 and 328.91

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Solution

The fourth proportional to 450.68, 674.64 and 328.91 is: 492.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.68 : 674.64 = 328.91 : x
  2. Step 2: Convert to fraction form
    450.68/674.64 = 328.91/x
  3. Step 3: Cross multiply
    450.68x = 674.64 × 328.91
  4. Step 4: Simplify right side
    450.68x = 221,895.84
  5. Step 5: Solve for x
    x = 221,895.84/450.68
  6. Step 6: Final answer
    x = 492.36

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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.