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Finding the Fourth Proportional to 688,940.70, 950,741.86 and 378,863.28

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Solution

The fourth proportional to 688,940.70, 950,741.86 and 378,863.28 is: 522,833.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,940.70 : 950,741.86 = 378,863.28 : x
  2. Step 2: Convert to fraction form
    688,940.70/950,741.86 = 378,863.28/x
  3. Step 3: Cross multiply
    688,940.70x = 950,741.86 × 378,863.28
  4. Step 4: Simplify right side
    688,940.70x = 360,201,182,122.07
  5. Step 5: Solve for x
    x = 360,201,182,122.07/688,940.70
  6. Step 6: Final answer
    x = 522,833.36

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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.