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Finding the Fourth Proportional to 328,458.30, 492,645.09 and 103,841.55

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Solution

The fourth proportional to 328,458.30, 492,645.09 and 103,841.55 is: 155,748.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,458.30 : 492,645.09 = 103,841.55 : x
  2. Step 2: Convert to fraction form
    328,458.30/492,645.09 = 103,841.55/x
  3. Step 3: Cross multiply
    328,458.30x = 492,645.09 × 103,841.55
  4. Step 4: Simplify right side
    328,458.30x = 51,157,029,745.49
  5. Step 5: Solve for x
    x = 51,157,029,745.49/328,458.30
  6. Step 6: Final answer
    x = 155,748.93

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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.