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Finding the Fourth Proportional to 407,960.67, 611,940.89 and 127,477.92

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Solution

The fourth proportional to 407,960.67, 611,940.89 and 127,477.92 is: 191,216.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,960.67 : 611,940.89 = 127,477.92 : x
  2. Step 2: Convert to fraction form
    407,960.67/611,940.89 = 127,477.92/x
  3. Step 3: Cross multiply
    407,960.67x = 611,940.89 × 127,477.92
  4. Step 4: Simplify right side
    407,960.67x = 78,008,951,182.76
  5. Step 5: Solve for x
    x = 78,008,951,182.76/407,960.67
  6. Step 6: Final answer
    x = 191,216.84

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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.