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Finding the Fourth Proportional to 528,796.58, 729,747.77 and 287,078.97

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Solution

The fourth proportional to 528,796.58, 729,747.77 and 287,078.97 is: 396,173.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,796.58 : 729,747.77 = 287,078.97 : x
  2. Step 2: Convert to fraction form
    528,796.58/729,747.77 = 287,078.97/x
  3. Step 3: Cross multiply
    528,796.58x = 729,747.77 × 287,078.97
  4. Step 4: Simplify right side
    528,796.58x = 209,495,238,171.40
  5. Step 5: Solve for x
    x = 209,495,238,171.40/528,796.58
  6. Step 6: Final answer
    x = 396,173.59

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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.