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Finding the Fourth Proportional to 515,433.15, 711,321.70 and 321,955.41

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Solution

The fourth proportional to 515,433.15, 711,321.70 and 321,955.41 is: 444,313.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,433.15 : 711,321.70 = 321,955.41 : x
  2. Step 2: Convert to fraction form
    515,433.15/711,321.70 = 321,955.41/x
  3. Step 3: Cross multiply
    515,433.15x = 711,321.70 × 321,955.41
  4. Step 4: Simplify right side
    515,433.15x = 229,013,867,955.62
  5. Step 5: Solve for x
    x = 229,013,867,955.62/515,433.15
  6. Step 6: Final answer
    x = 444,313.42

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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.