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Finding the Fourth Proportional to 285,997.92, 428,838.48 and 128,377.44

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Solution

The fourth proportional to 285,997.92, 428,838.48 and 128,377.44 is: 192,495.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,997.92 : 428,838.48 = 128,377.44 : x
  2. Step 2: Convert to fraction form
    285,997.92/428,838.48 = 128,377.44/x
  3. Step 3: Cross multiply
    285,997.92x = 428,838.48 × 128,377.44
  4. Step 4: Simplify right side
    285,997.92x = 55,053,186,235.89
  5. Step 5: Solve for x
    x = 55,053,186,235.89/285,997.92
  6. Step 6: Final answer
    x = 192,495.06

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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.