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Finding the Fourth Proportional to 389,855.18, 537,942.89 and 217,751.94

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Solution

The fourth proportional to 389,855.18, 537,942.89 and 217,751.94 is: 300,465.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,855.18 : 537,942.89 = 217,751.94 : x
  2. Step 2: Convert to fraction form
    389,855.18/537,942.89 = 217,751.94/x
  3. Step 3: Cross multiply
    389,855.18x = 537,942.89 × 217,751.94
  4. Step 4: Simplify right side
    389,855.18x = 117,138,108,451.09
  5. Step 5: Solve for x
    x = 117,138,108,451.09/389,855.18
  6. Step 6: Final answer
    x = 300,465.70

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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.