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Finding the Fourth Proportional to 442,674.89, 664,018.26 and 139,059.15

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Solution

The fourth proportional to 442,674.89, 664,018.26 and 139,059.15 is: 208,590.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,674.89 : 664,018.26 = 139,059.15 : x
  2. Step 2: Convert to fraction form
    442,674.89/664,018.26 = 139,059.15/x
  3. Step 3: Cross multiply
    442,674.89x = 664,018.26 × 139,059.15
  4. Step 4: Simplify right side
    442,674.89x = 92,337,813,575.04
  5. Step 5: Solve for x
    x = 92,337,813,575.04/442,674.89
  6. Step 6: Final answer
    x = 208,590.58

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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.