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Finding the Fourth Proportional to 262,938.84, 394,470.54 and 85,445.88

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Solution

The fourth proportional to 262,938.84, 394,470.54 and 85,445.88 is: 128,189.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,938.84 : 394,470.54 = 85,445.88 : x
  2. Step 2: Convert to fraction form
    262,938.84/394,470.54 = 85,445.88/x
  3. Step 3: Cross multiply
    262,938.84x = 394,470.54 × 85,445.88
  4. Step 4: Simplify right side
    262,938.84x = 33,705,882,424.38
  5. Step 5: Solve for x
    x = 33,705,882,424.38/262,938.84
  6. Step 6: Final answer
    x = 128,189.06

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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.