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Finding the Fourth Proportional to 355,108.81, 490,049.61 and 193,963.86

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Solution

The fourth proportional to 355,108.81, 490,049.61 and 193,963.86 is: 267,669.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,108.81 : 490,049.61 = 193,963.86 : x
  2. Step 2: Convert to fraction form
    355,108.81/490,049.61 = 193,963.86/x
  3. Step 3: Cross multiply
    355,108.81x = 490,049.61 × 193,963.86
  4. Step 4: Simplify right side
    355,108.81x = 95,051,911,976.88
  5. Step 5: Solve for x
    x = 95,051,911,976.88/355,108.81
  6. Step 6: Final answer
    x = 267,669.82

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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.