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Finding the Fourth Proportional to 286,218.60, 428,960.70 and 159,858.60

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Solution

The fourth proportional to 286,218.60, 428,960.70 and 159,858.60 is: 239,582.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,218.60 : 428,960.70 = 159,858.60 : x
  2. Step 2: Convert to fraction form
    286,218.60/428,960.70 = 159,858.60/x
  3. Step 3: Cross multiply
    286,218.60x = 428,960.70 × 159,858.60
  4. Step 4: Simplify right side
    286,218.60x = 68,573,056,957.02
  5. Step 5: Solve for x
    x = 68,573,056,957.02/286,218.60
  6. Step 6: Final answer
    x = 239,582.81

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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.