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Finding the Fourth Proportional to 394,513.20, 592,061.40 and 261,349.20

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Solution

The fourth proportional to 394,513.20, 592,061.40 and 261,349.20 is: 392,216.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,513.20 : 592,061.40 = 261,349.20 : x
  2. Step 2: Convert to fraction form
    394,513.20/592,061.40 = 261,349.20/x
  3. Step 3: Cross multiply
    394,513.20x = 592,061.40 × 261,349.20
  4. Step 4: Simplify right side
    394,513.20x = 154,734,773,240.88
  5. Step 5: Solve for x
    x = 154,734,773,240.88/394,513.20
  6. Step 6: Final answer
    x = 392,216.97

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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.