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Finding the Fourth Proportional to 328.34, 494.50 and 290.30

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Solution

The fourth proportional to 328.34, 494.50 and 290.30 is: 437.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.34 : 494.50 = 290.30 : x
  2. Step 2: Convert to fraction form
    328.34/494.50 = 290.30/x
  3. Step 3: Cross multiply
    328.34x = 494.50 × 290.30
  4. Step 4: Simplify right side
    328.34x = 143,553.35
  5. Step 5: Solve for x
    x = 143,553.35/328.34
  6. Step 6: Final answer
    x = 437.21

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.