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Finding the Fourth Proportional to 328,555.89, 492,894.59 and 103,972.86

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Solution

The fourth proportional to 328,555.89, 492,894.59 and 103,972.86 is: 155,978.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,555.89 : 492,894.59 = 103,972.86 : x
  2. Step 2: Convert to fraction form
    328,555.89/492,894.59 = 103,972.86/x
  3. Step 3: Cross multiply
    328,555.89x = 492,894.59 × 103,972.86
  4. Step 4: Simplify right side
    328,555.89x = 51,247,659,680.96
  5. Step 5: Solve for x
    x = 51,247,659,680.96/328,555.89
  6. Step 6: Final answer
    x = 155,978.51

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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.