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Finding the Fourth Proportional to 575.48, 860.78 and 518.68

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Solution

The fourth proportional to 575.48, 860.78 and 518.68 is: 775.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    575.48 : 860.78 = 518.68 : x
  2. Step 2: Convert to fraction form
    575.48/860.78 = 518.68/x
  3. Step 3: Cross multiply
    575.48x = 860.78 × 518.68
  4. Step 4: Simplify right side
    575.48x = 446,469.37
  5. Step 5: Solve for x
    x = 446,469.37/575.48
  6. Step 6: Final answer
    x = 775.82

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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.