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Finding the Fourth Proportional to 407,879.15, 611,189.96 and 218,364.66

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Solution

The fourth proportional to 407,879.15, 611,189.96 and 218,364.66 is: 327,210.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,879.15 : 611,189.96 = 218,364.66 : x
  2. Step 2: Convert to fraction form
    407,879.15/611,189.96 = 218,364.66/x
  3. Step 3: Cross multiply
    407,879.15x = 611,189.96 × 218,364.66
  4. Step 4: Simplify right side
    407,879.15x = 133,462,286,718.99
  5. Step 5: Solve for x
    x = 133,462,286,718.99/407,879.15
  6. Step 6: Final answer
    x = 327,210.37

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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.