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Finding the Fourth Proportional to 394,610.40, 591,915.60 and 145,389.60

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Solution

The fourth proportional to 394,610.40, 591,915.60 and 145,389.60 is: 218,084.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,610.40 : 591,915.60 = 145,389.60 : x
  2. Step 2: Convert to fraction form
    394,610.40/591,915.60 = 145,389.60/x
  3. Step 3: Cross multiply
    394,610.40x = 591,915.60 × 145,389.60
  4. Step 4: Simplify right side
    394,610.40x = 86,058,372,317.76
  5. Step 5: Solve for x
    x = 86,058,372,317.76/394,610.40
  6. Step 6: Final answer
    x = 218,084.40

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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.