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Finding the Fourth Proportional to 285,550.98, 428,327.46 and 72,318.84

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Solution

The fourth proportional to 285,550.98, 428,327.46 and 72,318.84 is: 108,478.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,550.98 : 428,327.46 = 72,318.84 : x
  2. Step 2: Convert to fraction form
    285,550.98/428,327.46 = 72,318.84/x
  3. Step 3: Cross multiply
    285,550.98x = 428,327.46 × 72,318.84
  4. Step 4: Simplify right side
    285,550.98x = 30,976,145,047.35
  5. Step 5: Solve for x
    x = 30,976,145,047.35/285,550.98
  6. Step 6: Final answer
    x = 108,478.51

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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.