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Finding the Fourth Proportional to 355.08, 529.94 and 300.21

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Solution

The fourth proportional to 355.08, 529.94 and 300.21 is: 448.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.08 : 529.94 = 300.21 : x
  2. Step 2: Convert to fraction form
    355.08/529.94 = 300.21/x
  3. Step 3: Cross multiply
    355.08x = 529.94 × 300.21
  4. Step 4: Simplify right side
    355.08x = 159,092.05
  5. Step 5: Solve for x
    x = 159,092.05/355.08
  6. Step 6: Final answer
    x = 448.04

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.