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Finding the Fourth Proportional to 578, 797.52 and 391.52

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Solution

The fourth proportional to 578, 797.52 and 391.52 is: 540.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    578 : 797.52 = 391.52 : x
  2. Step 2: Convert to fraction form
    578/797.52 = 391.52/x
  3. Step 3: Cross multiply
    578x = 797.52 × 391.52
  4. Step 4: Simplify right side
    578x = 312,245.03
  5. Step 5: Solve for x
    x = 312,245.03/578
  6. Step 6: Final answer
    x = 540.22

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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.