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Finding the Fourth Proportional to 379,913.49, 569,659.64 and 155,431.31

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Solution

The fourth proportional to 379,913.49, 569,659.64 and 155,431.31 is: 233,060.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,913.49 : 569,659.64 = 155,431.31 : x
  2. Step 2: Convert to fraction form
    379,913.49/569,659.64 = 155,431.31/x
  3. Step 3: Cross multiply
    379,913.49x = 569,659.64 × 155,431.31
  4. Step 4: Simplify right side
    379,913.49x = 88,542,940,473.87
  5. Step 5: Solve for x
    x = 88,542,940,473.87/379,913.49
  6. Step 6: Final answer
    x = 233,060.80

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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.