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Finding the Fourth Proportional to 578.16, 796.92 and 403.20

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Solution

The fourth proportional to 578.16, 796.92 and 403.20 is: 555.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.16 : 796.92 = 403.20 : x
  2. Step 2: Convert to fraction form
    578.16/796.92 = 403.20/x
  3. Step 3: Cross multiply
    578.16x = 796.92 × 403.20
  4. Step 4: Simplify right side
    578.16x = 321,318.14
  5. Step 5: Solve for x
    x = 321,318.14/578.16
  6. Step 6: Final answer
    x = 555.76

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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.