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Finding the Fourth Proportional to 515,436.66, 711,326.54 and 321,958.92

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Solution

The fourth proportional to 515,436.66, 711,326.54 and 321,958.92 is: 444,318.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,436.66 : 711,326.54 = 321,958.92 : x
  2. Step 2: Convert to fraction form
    515,436.66/711,326.54 = 321,958.92/x
  3. Step 3: Cross multiply
    515,436.66x = 711,326.54 × 321,958.92
  4. Step 4: Simplify right side
    515,436.66x = 229,017,922,975.94
  5. Step 5: Solve for x
    x = 229,017,922,975.94/515,436.66
  6. Step 6: Final answer
    x = 444,318.27

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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.