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Finding the Fourth Proportional to 409,825.60, 615,127.20 and 252,361.60

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Solution

The fourth proportional to 409,825.60, 615,127.20 and 252,361.60 is: 378,781.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,825.60 : 615,127.20 = 252,361.60 : x
  2. Step 2: Convert to fraction form
    409,825.60/615,127.20 = 252,361.60/x
  3. Step 3: Cross multiply
    409,825.60x = 615,127.20 × 252,361.60
  4. Step 4: Simplify right side
    409,825.60x = 155,234,484,395.52
  5. Step 5: Solve for x
    x = 155,234,484,395.52/409,825.60
  6. Step 6: Final answer
    x = 378,781.81

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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.