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Finding the Fourth Proportional to 578.56, 865.76 and 539.94

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Solution

The fourth proportional to 578.56, 865.76 and 539.94 is: 807.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.56 : 865.76 = 539.94 : x
  2. Step 2: Convert to fraction form
    578.56/865.76 = 539.94/x
  3. Step 3: Cross multiply
    578.56x = 865.76 × 539.94
  4. Step 4: Simplify right side
    578.56x = 467,458.45
  5. Step 5: Solve for x
    x = 467,458.45/578.56
  6. Step 6: Final answer
    x = 807.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.