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Finding the Fourth Proportional to 393,234.38, 542,655.34 and 218,800.72

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Solution

The fourth proportional to 393,234.38, 542,655.34 and 218,800.72 is: 301,940.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,234.38 : 542,655.34 = 218,800.72 : x
  2. Step 2: Convert to fraction form
    393,234.38/542,655.34 = 218,800.72/x
  3. Step 3: Cross multiply
    393,234.38x = 542,655.34 × 218,800.72
  4. Step 4: Simplify right side
    393,234.38x = 118,733,379,103.85
  5. Step 5: Solve for x
    x = 118,733,379,103.85/393,234.38
  6. Step 6: Final answer
    x = 301,940.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.