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Finding the Fourth Proportional to 547,135.61, 820,992.38 and 388,238.31

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Solution

The fourth proportional to 547,135.61, 820,992.38 and 388,238.31 is: 582,562.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,135.61 : 820,992.38 = 388,238.31 : x
  2. Step 2: Convert to fraction form
    547,135.61/820,992.38 = 388,238.31/x
  3. Step 3: Cross multiply
    547,135.61x = 820,992.38 × 388,238.31
  4. Step 4: Simplify right side
    547,135.61x = 318,740,692,192.89
  5. Step 5: Solve for x
    x = 318,740,692,192.89/547,135.61
  6. Step 6: Final answer
    x = 582,562.51

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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.