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Finding the Fourth Proportional to 422,658.44, 633,926.35 and 138,360.26

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Solution

The fourth proportional to 422,658.44, 633,926.35 and 138,360.26 is: 207,520.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,658.44 : 633,926.35 = 138,360.26 : x
  2. Step 2: Convert to fraction form
    422,658.44/633,926.35 = 138,360.26/x
  3. Step 3: Cross multiply
    422,658.44x = 633,926.35 × 138,360.26
  4. Step 4: Simplify right side
    422,658.44x = 87,710,211,615.47
  5. Step 5: Solve for x
    x = 87,710,211,615.47/422,658.44
  6. Step 6: Final answer
    x = 207,520.31

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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.