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Finding the Fourth Proportional to 605,040.60, 907,560.90 and 394,915.80

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Solution

The fourth proportional to 605,040.60, 907,560.90 and 394,915.80 is: 592,373.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,040.60 : 907,560.90 = 394,915.80 : x
  2. Step 2: Convert to fraction form
    605,040.60/907,560.90 = 394,915.80/x
  3. Step 3: Cross multiply
    605,040.60x = 907,560.90 × 394,915.80
  4. Step 4: Simplify right side
    605,040.60x = 358,410,138,872.22
  5. Step 5: Solve for x
    x = 358,410,138,872.22/605,040.60
  6. Step 6: Final answer
    x = 592,373.70

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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.