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Finding the Fourth Proportional to 328,658.45, 492,938.19 and 103,989.62

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Solution

The fourth proportional to 328,658.45, 492,938.19 and 103,989.62 is: 155,968.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,658.45 : 492,938.19 = 103,989.62 : x
  2. Step 2: Convert to fraction form
    328,658.45/492,938.19 = 103,989.62/x
  3. Step 3: Cross multiply
    328,658.45x = 492,938.19 × 103,989.62
  4. Step 4: Simplify right side
    328,658.45x = 51,260,456,293.93
  5. Step 5: Solve for x
    x = 51,260,456,293.93/328,658.45
  6. Step 6: Final answer
    x = 155,968.78

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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.