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Finding the Fourth Proportional to 385,138.98, 531,495.81 and 215,382.42

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Solution

The fourth proportional to 385,138.98, 531,495.81 and 215,382.42 is: 297,229.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,138.98 : 531,495.81 = 215,382.42 : x
  2. Step 2: Convert to fraction form
    385,138.98/531,495.81 = 215,382.42/x
  3. Step 3: Cross multiply
    385,138.98x = 531,495.81 × 215,382.42
  4. Step 4: Simplify right side
    385,138.98x = 114,474,853,777.66
  5. Step 5: Solve for x
    x = 114,474,853,777.66/385,138.98
  6. Step 6: Final answer
    x = 297,229.99

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.