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Finding the Fourth Proportional to 308,966.40, 463,449.60 and 131,479.20

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Solution

The fourth proportional to 308,966.40, 463,449.60 and 131,479.20 is: 197,218.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,966.40 : 463,449.60 = 131,479.20 : x
  2. Step 2: Convert to fraction form
    308,966.40/463,449.60 = 131,479.20/x
  3. Step 3: Cross multiply
    308,966.40x = 463,449.60 × 131,479.20
  4. Step 4: Simplify right side
    308,966.40x = 60,933,982,648.32
  5. Step 5: Solve for x
    x = 60,933,982,648.32/308,966.40
  6. Step 6: Final answer
    x = 197,218.80

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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.