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Finding the Fourth Proportional to 481,914.31, 665,018.93 and 288,428.63

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Solution

The fourth proportional to 481,914.31, 665,018.93 and 288,428.63 is: 398,017.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,914.31 : 665,018.93 = 288,428.63 : x
  2. Step 2: Convert to fraction form
    481,914.31/665,018.93 = 288,428.63/x
  3. Step 3: Cross multiply
    481,914.31x = 665,018.93 × 288,428.63
  4. Step 4: Simplify right side
    481,914.31x = 191,810,498,903.97
  5. Step 5: Solve for x
    x = 191,810,498,903.97/481,914.31
  6. Step 6: Final answer
    x = 398,017.85

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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.