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Finding the Fourth Proportional to 287,168.45, 396,185.87 and 286,725.59

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Solution

The fourth proportional to 287,168.45, 396,185.87 and 286,725.59 is: 395,574.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,168.45 : 396,185.87 = 286,725.59 : x
  2. Step 2: Convert to fraction form
    287,168.45/396,185.87 = 286,725.59/x
  3. Step 3: Cross multiply
    287,168.45x = 396,185.87 × 286,725.59
  4. Step 4: Simplify right side
    287,168.45x = 113,596,623,910.86
  5. Step 5: Solve for x
    x = 113,596,623,910.86/287,168.45
  6. Step 6: Final answer
    x = 395,574.88

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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.