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Finding the Fourth Proportional to 328,420.56, 492,627.91 and 103,781.04

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Solution

The fourth proportional to 328,420.56, 492,627.91 and 103,781.04 is: 155,670.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,420.56 : 492,627.91 = 103,781.04 : x
  2. Step 2: Convert to fraction form
    328,420.56/492,627.91 = 103,781.04/x
  3. Step 3: Cross multiply
    328,420.56x = 492,627.91 × 103,781.04
  4. Step 4: Simplify right side
    328,420.56x = 51,125,436,832.83
  5. Step 5: Solve for x
    x = 51,125,436,832.83/328,420.56
  6. Step 6: Final answer
    x = 155,670.63

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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.