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Finding the Fourth Proportional to 405,087.40, 606,464.70 and 247,623.40

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Solution

The fourth proportional to 405,087.40, 606,464.70 and 247,623.40 is: 370,722.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,087.40 : 606,464.70 = 247,623.40 : x
  2. Step 2: Convert to fraction form
    405,087.40/606,464.70 = 247,623.40/x
  3. Step 3: Cross multiply
    405,087.40x = 606,464.70 × 247,623.40
  4. Step 4: Simplify right side
    405,087.40x = 150,174,850,993.98
  5. Step 5: Solve for x
    x = 150,174,850,993.98/405,087.40
  6. Step 6: Final answer
    x = 370,722.10

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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.