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Finding the Fourth Proportional to 387,627.88, 581,688.06 and 200,639.38

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Solution

The fourth proportional to 387,627.88, 581,688.06 and 200,639.38 is: 301,086.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,627.88 : 581,688.06 = 200,639.38 : x
  2. Step 2: Convert to fraction form
    387,627.88/581,688.06 = 200,639.38/x
  3. Step 3: Cross multiply
    387,627.88x = 581,688.06 × 200,639.38
  4. Step 4: Simplify right side
    387,627.88x = 116,709,531,711.80
  5. Step 5: Solve for x
    x = 116,709,531,711.80/387,627.88
  6. Step 6: Final answer
    x = 301,086.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.