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Finding the Fourth Proportional to 627.42, 942.21 and 339.06

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Solution

The fourth proportional to 627.42, 942.21 and 339.06 is: 509.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.42 : 942.21 = 339.06 : x
  2. Step 2: Convert to fraction form
    627.42/942.21 = 339.06/x
  3. Step 3: Cross multiply
    627.42x = 942.21 × 339.06
  4. Step 4: Simplify right side
    627.42x = 319,465.72
  5. Step 5: Solve for x
    x = 319,465.72/627.42
  6. Step 6: Final answer
    x = 509.17

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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.