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Finding the Fourth Proportional to 328,517.60, 492,390.05 and 148,392.79

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Solution

The fourth proportional to 328,517.60, 492,390.05 and 148,392.79 is: 222,414.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,517.60 : 492,390.05 = 148,392.79 : x
  2. Step 2: Convert to fraction form
    328,517.60/492,390.05 = 148,392.79/x
  3. Step 3: Cross multiply
    328,517.60x = 492,390.05 × 148,392.79
  4. Step 4: Simplify right side
    328,517.60x = 73,067,132,427.75
  5. Step 5: Solve for x
    x = 73,067,132,427.75/328,517.60
  6. Step 6: Final answer
    x = 222,414.67

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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.