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Finding the Fourth Proportional to 571.39, 789.15 and 522.25

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Solution

The fourth proportional to 571.39, 789.15 and 522.25 is: 721.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.39 : 789.15 = 522.25 : x
  2. Step 2: Convert to fraction form
    571.39/789.15 = 522.25/x
  3. Step 3: Cross multiply
    571.39x = 789.15 × 522.25
  4. Step 4: Simplify right side
    571.39x = 412,133.59
  5. Step 5: Solve for x
    x = 412,133.59/571.39
  6. Step 6: Final answer
    x = 721.28

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Double scale
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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.