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Finding the Fourth Proportional to 488.02, 674.02 and 330.40

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Solution

The fourth proportional to 488.02, 674.02 and 330.40 is: 456.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.02 : 674.02 = 330.40 : x
  2. Step 2: Convert to fraction form
    488.02/674.02 = 330.40/x
  3. Step 3: Cross multiply
    488.02x = 674.02 × 330.40
  4. Step 4: Simplify right side
    488.02x = 222,696.21
  5. Step 5: Solve for x
    x = 222,696.21/488.02
  6. Step 6: Final answer
    x = 456.33

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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.