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Finding the Fourth Proportional to 324,542.72, 485,629.92 and 191,486.72

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Solution

The fourth proportional to 324,542.72, 485,629.92 and 191,486.72 is: 286,531.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,542.72 : 485,629.92 = 191,486.72 : x
  2. Step 2: Convert to fraction form
    324,542.72/485,629.92 = 191,486.72/x
  3. Step 3: Cross multiply
    324,542.72x = 485,629.92 × 191,486.72
  4. Step 4: Simplify right side
    324,542.72x = 92,991,680,514.66
  5. Step 5: Solve for x
    x = 92,991,680,514.66/324,542.72
  6. Step 6: Final answer
    x = 286,531.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.