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Finding the Fourth Proportional to 287,087.92, 395,770.74 and 201,940.72

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Solution

The fourth proportional to 287,087.92, 395,770.74 and 201,940.72 is: 278,389.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,087.92 : 395,770.74 = 201,940.72 : x
  2. Step 2: Convert to fraction form
    287,087.92/395,770.74 = 201,940.72/x
  3. Step 3: Cross multiply
    287,087.92x = 395,770.74 × 201,940.72
  4. Step 4: Simplify right side
    287,087.92x = 79,922,228,190.53
  5. Step 5: Solve for x
    x = 79,922,228,190.53/287,087.92
  6. Step 6: Final answer
    x = 278,389.38

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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.