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Finding the Fourth Proportional to 389,854.62, 537,942.11 and 217,751.38

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Solution

The fourth proportional to 389,854.62, 537,942.11 and 217,751.38 is: 300,464.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,854.62 : 537,942.11 = 217,751.38 : x
  2. Step 2: Convert to fraction form
    389,854.62/537,942.11 = 217,751.38/x
  3. Step 3: Cross multiply
    389,854.62x = 537,942.11 × 217,751.38
  4. Step 4: Simplify right side
    389,854.62x = 117,137,636,812.61
  5. Step 5: Solve for x
    x = 117,137,636,812.61/389,854.62
  6. Step 6: Final answer
    x = 300,464.92

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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.