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Finding the Fourth Proportional to 605,887.80, 908,831.70 and 394,380.60

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Solution

The fourth proportional to 605,887.80, 908,831.70 and 394,380.60 is: 591,570.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,887.80 : 908,831.70 = 394,380.60 : x
  2. Step 2: Convert to fraction form
    605,887.80/908,831.70 = 394,380.60/x
  3. Step 3: Cross multiply
    605,887.80x = 908,831.70 × 394,380.60
  4. Step 4: Simplify right side
    605,887.80x = 358,425,591,145.02
  5. Step 5: Solve for x
    x = 358,425,591,145.02/605,887.80
  6. Step 6: Final answer
    x = 591,570.90

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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.