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Finding the Fourth Proportional to 547,137.60, 820,995.38 and 388,240.32

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Solution

The fourth proportional to 547,137.60, 820,995.38 and 388,240.32 is: 582,565.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,137.60 : 820,995.38 = 388,240.32 : x
  2. Step 2: Convert to fraction form
    547,137.60/820,995.38 = 388,240.32/x
  3. Step 3: Cross multiply
    547,137.60x = 820,995.38 × 388,240.32
  4. Step 4: Simplify right side
    547,137.60x = 318,743,509,049.72
  5. Step 5: Solve for x
    x = 318,743,509,049.72/547,137.60
  6. Step 6: Final answer
    x = 582,565.54

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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.