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Finding the Fourth Proportional to 691,759, 954,642 and 389,953

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Solution

The fourth proportional to 691,759, 954,642 and 389,953 is: 538,143.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,759 : 954,642 = 389,953 : x
  2. Step 2: Convert to fraction form
    691,759/954,642 = 389,953/x
  3. Step 3: Cross multiply
    691,759x = 954,642 × 389,953
  4. Step 4: Simplify right side
    691,759x = 372,265,511,826
  5. Step 5: Solve for x
    x = 372,265,511,826/691,759
  6. Step 6: Final answer
    x = 538,143.36

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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.