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Finding the Fourth Proportional to 666,879.51, 999,816.18 and 217,331.94

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Solution

The fourth proportional to 666,879.51, 999,816.18 and 217,331.94 is: 325,833.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,879.51 : 999,816.18 = 217,331.94 : x
  2. Step 2: Convert to fraction form
    666,879.51/999,816.18 = 217,331.94/x
  3. Step 3: Cross multiply
    666,879.51x = 999,816.18 × 217,331.94
  4. Step 4: Simplify right side
    666,879.51x = 217,291,990,042.79
  5. Step 5: Solve for x
    x = 217,291,990,042.79/666,879.51
  6. Step 6: Final answer
    x = 325,833.96

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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.