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Finding the Fourth Proportional to 329,911.20, 494,751.60 and 172,087.20

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Solution

The fourth proportional to 329,911.20, 494,751.60 and 172,087.20 is: 258,070.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    329,911.20 : 494,751.60 = 172,087.20 : x
  2. Step 2: Convert to fraction form
    329,911.20/494,751.60 = 172,087.20/x
  3. Step 3: Cross multiply
    329,911.20x = 494,751.60 × 172,087.20
  4. Step 4: Simplify right side
    329,911.20x = 85,140,417,539.52
  5. Step 5: Solve for x
    x = 85,140,417,539.52/329,911.20
  6. Step 6: Final answer
    x = 258,070.71

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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.