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Finding the Fourth Proportional to 548,432.56, 756,849.18 and 387,571.42

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Solution

The fourth proportional to 548,432.56, 756,849.18 and 387,571.42 is: 534,857.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,432.56 : 756,849.18 = 387,571.42 : x
  2. Step 2: Convert to fraction form
    548,432.56/756,849.18 = 387,571.42/x
  3. Step 3: Cross multiply
    548,432.56x = 756,849.18 × 387,571.42
  4. Step 4: Simplify right side
    548,432.56x = 293,333,111,418.44
  5. Step 5: Solve for x
    x = 293,333,111,418.44/548,432.56
  6. Step 6: Final answer
    x = 534,857.21

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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.