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Finding the Fourth Proportional to 394,245.28, 544,058.70 and 212,957.20

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Solution

The fourth proportional to 394,245.28, 544,058.70 and 212,957.20 is: 293,881.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,245.28 : 544,058.70 = 212,957.20 : x
  2. Step 2: Convert to fraction form
    394,245.28/544,058.70 = 212,957.20/x
  3. Step 3: Cross multiply
    394,245.28x = 544,058.70 × 212,957.20
  4. Step 4: Simplify right side
    394,245.28x = 115,861,217,387.64
  5. Step 5: Solve for x
    x = 115,861,217,387.64/394,245.28
  6. Step 6: Final answer
    x = 293,881.05

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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.