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Finding the Fourth Proportional to 385,375.72, 531,827.94 and 215,620.84

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Solution

The fourth proportional to 385,375.72, 531,827.94 and 215,620.84 is: 297,562.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,375.72 : 531,827.94 = 215,620.84 : x
  2. Step 2: Convert to fraction form
    385,375.72/531,827.94 = 215,620.84/x
  3. Step 3: Cross multiply
    385,375.72x = 531,827.94 × 215,620.84
  4. Step 4: Simplify right side
    385,375.72x = 114,673,187,158.27
  5. Step 5: Solve for x
    x = 114,673,187,158.27/385,375.72
  6. Step 6: Final answer
    x = 297,562.04

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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.