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Finding the Fourth Proportional to 336,915.78, 505,010.79 and 178,985.22

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Solution

The fourth proportional to 336,915.78, 505,010.79 and 178,985.22 is: 268,285.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    336,915.78 : 505,010.79 = 178,985.22 : x
  2. Step 2: Convert to fraction form
    336,915.78/505,010.79 = 178,985.22/x
  3. Step 3: Cross multiply
    336,915.78x = 505,010.79 × 178,985.22
  4. Step 4: Simplify right side
    336,915.78x = 90,389,467,350.52
  5. Step 5: Solve for x
    x = 90,389,467,350.52/336,915.78
  6. Step 6: Final answer
    x = 268,285.05

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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.