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Finding the Fourth Proportional to 355,041.69, 489,960.86 and 202,072.38

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Solution

The fourth proportional to 355,041.69, 489,960.86 and 202,072.38 is: 278,861.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,041.69 : 489,960.86 = 202,072.38 : x
  2. Step 2: Convert to fraction form
    355,041.69/489,960.86 = 202,072.38/x
  3. Step 3: Cross multiply
    355,041.69x = 489,960.86 × 202,072.38
  4. Step 4: Simplify right side
    355,041.69x = 99,007,557,087.05
  5. Step 5: Solve for x
    x = 99,007,557,087.05/355,041.69
  6. Step 6: Final answer
    x = 278,861.78

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1.5x scale

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.