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Finding the Fourth Proportional to 328,691.89, 493,317.60 and 129,151.81

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Solution

The fourth proportional to 328,691.89, 493,317.60 and 129,151.81 is: 193,837.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,691.89 : 493,317.60 = 129,151.81 : x
  2. Step 2: Convert to fraction form
    328,691.89/493,317.60 = 129,151.81/x
  3. Step 3: Cross multiply
    328,691.89x = 493,317.60 × 129,151.81
  4. Step 4: Simplify right side
    328,691.89x = 63,712,860,944.86
  5. Step 5: Solve for x
    x = 63,712,860,944.86/328,691.89
  6. Step 6: Final answer
    x = 193,837.64

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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.