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Finding the Fourth Proportional to 276,214.68, 381,187.62 and 155,361.60

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Solution

The fourth proportional to 276,214.68, 381,187.62 and 155,361.60 is: 214,405.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,214.68 : 381,187.62 = 155,361.60 : x
  2. Step 2: Convert to fraction form
    276,214.68/381,187.62 = 155,361.60/x
  3. Step 3: Cross multiply
    276,214.68x = 381,187.62 × 155,361.60
  4. Step 4: Simplify right side
    276,214.68x = 59,221,918,543.39
  5. Step 5: Solve for x
    x = 59,221,918,543.39/276,214.68
  6. Step 6: Final answer
    x = 214,405.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.