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Finding the Fourth Proportional to 351,055.78, 526,879.07 and 328,912.40

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Solution

The fourth proportional to 351,055.78, 526,879.07 and 328,912.40 is: 493,645.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,055.78 : 526,879.07 = 328,912.40 : x
  2. Step 2: Convert to fraction form
    351,055.78/526,879.07 = 328,912.40/x
  3. Step 3: Cross multiply
    351,055.78x = 526,879.07 × 328,912.40
  4. Step 4: Simplify right side
    351,055.78x = 173,297,059,423.47
  5. Step 5: Solve for x
    x = 173,297,059,423.47/351,055.78
  6. Step 6: Final answer
    x = 493,645.37

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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.