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Finding the Fourth Proportional to 405,090.40, 606,469.20 and 247,626.40

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Solution

The fourth proportional to 405,090.40, 606,469.20 and 247,626.40 is: 370,726.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,090.40 : 606,469.20 = 247,626.40 : x
  2. Step 2: Convert to fraction form
    405,090.40/606,469.20 = 247,626.40/x
  3. Step 3: Cross multiply
    405,090.40x = 606,469.20 × 247,626.40
  4. Step 4: Simplify right side
    405,090.40x = 150,177,784,706.88
  5. Step 5: Solve for x
    x = 150,177,784,706.88/405,090.40
  6. Step 6: Final answer
    x = 370,726.60

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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.