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Finding the Fourth Proportional to 578.96, 796.54 and 505.45

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Solution

The fourth proportional to 578.96, 796.54 and 505.45 is: 695.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.96 : 796.54 = 505.45 : x
  2. Step 2: Convert to fraction form
    578.96/796.54 = 505.45/x
  3. Step 3: Cross multiply
    578.96x = 796.54 × 505.45
  4. Step 4: Simplify right side
    578.96x = 402,611.14
  5. Step 5: Solve for x
    x = 402,611.14/578.96
  6. Step 6: Final answer
    x = 695.40

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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.