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Finding the Fourth Proportional to 505,434.69, 758,148.98 and 126,353.61

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Solution

The fourth proportional to 505,434.69, 758,148.98 and 126,353.61 is: 189,529.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,434.69 : 758,148.98 = 126,353.61 : x
  2. Step 2: Convert to fraction form
    505,434.69/758,148.98 = 126,353.61/x
  3. Step 3: Cross multiply
    505,434.69x = 758,148.98 × 126,353.61
  4. Step 4: Simplify right side
    505,434.69x = 95,794,859,909.05
  5. Step 5: Solve for x
    x = 95,794,859,909.05/505,434.69
  6. Step 6: Final answer
    x = 189,529.65

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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.