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Finding the Fourth Proportional to 308,958.40, 463,610.40 and 131,435.20

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Solution

The fourth proportional to 308,958.40, 463,610.40 and 131,435.20 is: 197,226.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,958.40 : 463,610.40 = 131,435.20 : x
  2. Step 2: Convert to fraction form
    308,958.40/463,610.40 = 131,435.20/x
  3. Step 3: Cross multiply
    308,958.40x = 463,610.40 × 131,435.20
  4. Step 4: Simplify right side
    308,958.40x = 60,934,725,646.08
  5. Step 5: Solve for x
    x = 60,934,725,646.08/308,958.40
  6. Step 6: Final answer
    x = 197,226.31

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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.