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Finding the Fourth Proportional to 481,989.40, 665,145.42 and 267,143.32

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Solution

The fourth proportional to 481,989.40, 665,145.42 and 267,143.32 is: 368,657.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,989.40 : 665,145.42 = 267,143.32 : x
  2. Step 2: Convert to fraction form
    481,989.40/665,145.42 = 267,143.32/x
  3. Step 3: Cross multiply
    481,989.40x = 665,145.42 × 267,143.32
  4. Step 4: Simplify right side
    481,989.40x = 177,689,155,781.59
  5. Step 5: Solve for x
    x = 177,689,155,781.59/481,989.40
  6. Step 6: Final answer
    x = 368,657.81

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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.