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Finding the Fourth Proportional to 438,665.04, 658,020.96 and 139,169.58

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Solution

The fourth proportional to 438,665.04, 658,020.96 and 139,169.58 is: 208,761.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,665.04 : 658,020.96 = 139,169.58 : x
  2. Step 2: Convert to fraction form
    438,665.04/658,020.96 = 139,169.58/x
  3. Step 3: Cross multiply
    438,665.04x = 658,020.96 × 139,169.58
  4. Step 4: Simplify right side
    438,665.04x = 91,576,500,634.40
  5. Step 5: Solve for x
    x = 91,576,500,634.40/438,665.04
  6. Step 6: Final answer
    x = 208,761.79

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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.