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Finding the Fourth Proportional to 605,216.80, 907,825.20 and 393,709.60

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Solution

The fourth proportional to 605,216.80, 907,825.20 and 393,709.60 is: 590,564.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,216.80 : 907,825.20 = 393,709.60 : x
  2. Step 2: Convert to fraction form
    605,216.80/907,825.20 = 393,709.60/x
  3. Step 3: Cross multiply
    605,216.80x = 907,825.20 × 393,709.60
  4. Step 4: Simplify right side
    605,216.80x = 357,419,496,361.92
  5. Step 5: Solve for x
    x = 357,419,496,361.92/605,216.80
  6. Step 6: Final answer
    x = 590,564.40

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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.