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Finding the Fourth Proportional to 481,912.31, 665,016.18 and 288,426.63

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Solution

The fourth proportional to 481,912.31, 665,016.18 and 288,426.63 is: 398,015.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,912.31 : 665,016.18 = 288,426.63 : x
  2. Step 2: Convert to fraction form
    481,912.31/665,016.18 = 288,426.63/x
  3. Step 3: Cross multiply
    481,912.31x = 665,016.18 × 288,426.63
  4. Step 4: Simplify right side
    481,912.31x = 191,808,374,250.74
  5. Step 5: Solve for x
    x = 191,808,374,250.74/481,912.31
  6. Step 6: Final answer
    x = 398,015.10

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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.