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Finding the Fourth Proportional to 287,939.90, 397,354.35 and 158,879.54

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Solution

The fourth proportional to 287,939.90, 397,354.35 and 158,879.54 is: 219,252.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,939.90 : 397,354.35 = 158,879.54 : x
  2. Step 2: Convert to fraction form
    287,939.90/397,354.35 = 158,879.54/x
  3. Step 3: Cross multiply
    287,939.90x = 397,354.35 × 158,879.54
  4. Step 4: Simplify right side
    287,939.90x = 63,131,476,345.00
  5. Step 5: Solve for x
    x = 63,131,476,345.00/287,939.90
  6. Step 6: Final answer
    x = 219,252.27

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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.