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Finding the Fourth Proportional to 627.96, 942.30 and 339.42

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Solution

The fourth proportional to 627.96, 942.30 and 339.42 is: 509.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.96 : 942.30 = 339.42 : x
  2. Step 2: Convert to fraction form
    627.96/942.30 = 339.42/x
  3. Step 3: Cross multiply
    627.96x = 942.30 × 339.42
  4. Step 4: Simplify right side
    627.96x = 319,835.47
  5. Step 5: Solve for x
    x = 319,835.47/627.96
  6. Step 6: Final answer
    x = 509.32

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Double scale
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Similar ratio
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1.5x scale

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.