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Finding the Fourth Proportional to 394,429.60, 591,298.80 and 236,490.40

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Solution

The fourth proportional to 394,429.60, 591,298.80 and 236,490.40 is: 354,528.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,429.60 : 591,298.80 = 236,490.40 : x
  2. Step 2: Convert to fraction form
    394,429.60/591,298.80 = 236,490.40/x
  3. Step 3: Cross multiply
    394,429.60x = 591,298.80 × 236,490.40
  4. Step 4: Simplify right side
    394,429.60x = 139,836,489,731.52
  5. Step 5: Solve for x
    x = 139,836,489,731.52/394,429.60
  6. Step 6: Final answer
    x = 354,528.39

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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.