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Finding the Fourth Proportional to 627.40, 939.84 and 353.08

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Solution

The fourth proportional to 627.40, 939.84 and 353.08 is: 528.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.40 : 939.84 = 353.08 : x
  2. Step 2: Convert to fraction form
    627.40/939.84 = 353.08/x
  3. Step 3: Cross multiply
    627.40x = 939.84 × 353.08
  4. Step 4: Simplify right side
    627.40x = 331,838.71
  5. Step 5: Solve for x
    x = 331,838.71/627.40
  6. Step 6: Final answer
    x = 528.91

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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.