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Finding the Fourth Proportional to 572.41, 789.97 and 478.99

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Solution

The fourth proportional to 572.41, 789.97 and 478.99 is: 661.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.41 : 789.97 = 478.99 : x
  2. Step 2: Convert to fraction form
    572.41/789.97 = 478.99/x
  3. Step 3: Cross multiply
    572.41x = 789.97 × 478.99
  4. Step 4: Simplify right side
    572.41x = 378,383.78
  5. Step 5: Solve for x
    x = 378,383.78/572.41
  6. Step 6: Final answer
    x = 661.04

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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.