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Finding the Fourth Proportional to 578.58, 797.61 and 357.39

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Solution

The fourth proportional to 578.58, 797.61 and 357.39 is: 492.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.58 : 797.61 = 357.39 : x
  2. Step 2: Convert to fraction form
    578.58/797.61 = 357.39/x
  3. Step 3: Cross multiply
    578.58x = 797.61 × 357.39
  4. Step 4: Simplify right side
    578.58x = 285,057.84
  5. Step 5: Solve for x
    x = 285,057.84/578.58
  6. Step 6: Final answer
    x = 492.69

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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.