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Finding the Fourth Proportional to 405,991.80, 608,930.10 and 125,537.40

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Solution

The fourth proportional to 405,991.80, 608,930.10 and 125,537.40 is: 188,288.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,991.80 : 608,930.10 = 125,537.40 : x
  2. Step 2: Convert to fraction form
    405,991.80/608,930.10 = 125,537.40/x
  3. Step 3: Cross multiply
    405,991.80x = 608,930.10 × 125,537.40
  4. Step 4: Simplify right side
    405,991.80x = 76,443,501,535.74
  5. Step 5: Solve for x
    x = 76,443,501,535.74/405,991.80
  6. Step 6: Final answer
    x = 188,288.29

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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.