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Finding the Fourth Proportional to 308,921.60, 463,425.60 and 131,427.20

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Solution

The fourth proportional to 308,921.60, 463,425.60 and 131,427.20 is: 197,159.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,921.60 : 463,425.60 = 131,427.20 : x
  2. Step 2: Convert to fraction form
    308,921.60/463,425.60 = 131,427.20/x
  3. Step 3: Cross multiply
    308,921.60x = 463,425.60 × 131,427.20
  4. Step 4: Simplify right side
    308,921.60x = 60,906,729,016.32
  5. Step 5: Solve for x
    x = 60,906,729,016.32/308,921.60
  6. Step 6: Final answer
    x = 197,159.18

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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.