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Finding the Fourth Proportional to 405,939.70, 608,909.55 and 125,542.90

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Solution

The fourth proportional to 405,939.70, 608,909.55 and 125,542.90 is: 188,314.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,939.70 : 608,909.55 = 125,542.90 : x
  2. Step 2: Convert to fraction form
    405,939.70/608,909.55 = 125,542.90/x
  3. Step 3: Cross multiply
    405,939.70x = 608,909.55 × 125,542.90
  4. Step 4: Simplify right side
    405,939.70x = 76,444,270,744.70
  5. Step 5: Solve for x
    x = 76,444,270,744.70/405,939.70
  6. Step 6: Final answer
    x = 188,314.35

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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.