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Finding the Fourth Proportional to 439,464.26, 658,978.30 and 139,905.80

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Solution

The fourth proportional to 439,464.26, 658,978.30 and 139,905.80 is: 209,789.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,464.26 : 658,978.30 = 139,905.80 : x
  2. Step 2: Convert to fraction form
    439,464.26/658,978.30 = 139,905.80/x
  3. Step 3: Cross multiply
    439,464.26x = 658,978.30 × 139,905.80
  4. Step 4: Simplify right side
    439,464.26x = 92,194,886,244.14
  5. Step 5: Solve for x
    x = 92,194,886,244.14/439,464.26
  6. Step 6: Final answer
    x = 209,789.27

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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.