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Finding the Fourth Proportional to 438,889.89, 658,267.56 and 139,331.64

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Solution

The fourth proportional to 438,889.89, 658,267.56 and 139,331.64 is: 208,976.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,889.89 : 658,267.56 = 139,331.64 : x
  2. Step 2: Convert to fraction form
    438,889.89/658,267.56 = 139,331.64/x
  3. Step 3: Cross multiply
    438,889.89x = 658,267.56 × 139,331.64
  4. Step 4: Simplify right side
    438,889.89x = 91,717,498,693.60
  5. Step 5: Solve for x
    x = 91,717,498,693.60/438,889.89
  6. Step 6: Final answer
    x = 208,976.10

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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.