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Finding the Fourth Proportional to 691,856,424.36, 954,761,827.32 and 378,590,676.12

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Solution

The fourth proportional to 691,856,424.36, 954,761,827.32 and 378,590,676.12 is: 522,455,112.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,856,424.36 : 954,761,827.32 = 378,590,676.12 : x
  2. Step 2: Convert to fraction form
    691,856,424.36/954,761,827.32 = 378,590,676.12/x
  3. Step 3: Cross multiply
    691,856,424.36x = 954,761,827.32 × 378,590,676.12
  4. Step 4: Simplify right side
    691,856,424.36x = 361,463,925,738,645,504
  5. Step 5: Solve for x
    x = 361,463,925,738,645,504/691,856,424.36
  6. Step 6: Final answer
    x = 522,455,112.09

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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.