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Finding the Fourth Proportional to 394,425.60, 591,292.80 and 236,486.40

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Solution

The fourth proportional to 394,425.60, 591,292.80 and 236,486.40 is: 354,522.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,425.60 : 591,292.80 = 236,486.40 : x
  2. Step 2: Convert to fraction form
    394,425.60/591,292.80 = 236,486.40/x
  3. Step 3: Cross multiply
    394,425.60x = 591,292.80 × 236,486.40
  4. Step 4: Simplify right side
    394,425.60x = 139,832,705,617.92
  5. Step 5: Solve for x
    x = 139,832,705,617.92/394,425.60
  6. Step 6: Final answer
    x = 354,522.39

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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.