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Finding the Fourth Proportional to 389,585.94, 537,636.99 and 215,155.61

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Solution

The fourth proportional to 389,585.94, 537,636.99 and 215,155.61 is: 296,919.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,585.94 : 537,636.99 = 215,155.61 : x
  2. Step 2: Convert to fraction form
    389,585.94/537,636.99 = 215,155.61/x
  3. Step 3: Cross multiply
    389,585.94x = 537,636.99 × 215,155.61
  4. Step 4: Simplify right side
    389,585.94x = 115,675,611,853.83
  5. Step 5: Solve for x
    x = 115,675,611,853.83/389,585.94
  6. Step 6: Final answer
    x = 296,919.37

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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.