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Finding the Fourth Proportional to 389,567.63, 537,636.15 and 219,834.56

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Solution

The fourth proportional to 389,567.63, 537,636.15 and 219,834.56 is: 303,390.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,567.63 : 537,636.15 = 219,834.56 : x
  2. Step 2: Convert to fraction form
    389,567.63/537,636.15 = 219,834.56/x
  3. Step 3: Cross multiply
    389,567.63x = 537,636.15 × 219,834.56
  4. Step 4: Simplify right side
    389,567.63x = 118,191,003,787.16
  5. Step 5: Solve for x
    x = 118,191,003,787.16/389,567.63
  6. Step 6: Final answer
    x = 303,390.21

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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.