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Finding the Fourth Proportional to 578.37, 863.34 and 505.47

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Solution

The fourth proportional to 578.37, 863.34 and 505.47 is: 754.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.37 : 863.34 = 505.47 : x
  2. Step 2: Convert to fraction form
    578.37/863.34 = 505.47/x
  3. Step 3: Cross multiply
    578.37x = 863.34 × 505.47
  4. Step 4: Simplify right side
    578.37x = 436,392.47
  5. Step 5: Solve for x
    x = 436,392.47/578.37
  6. Step 6: Final answer
    x = 754.52

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.