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Finding the Fourth Proportional to 571.38, 788.57 and 397.09

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Solution

The fourth proportional to 571.38, 788.57 and 397.09 is: 548.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.38 : 788.57 = 397.09 : x
  2. Step 2: Convert to fraction form
    571.38/788.57 = 397.09/x
  3. Step 3: Cross multiply
    571.38x = 788.57 × 397.09
  4. Step 4: Simplify right side
    571.38x = 313,131.28
  5. Step 5: Solve for x
    x = 313,131.28/571.38
  6. Step 6: Final answer
    x = 548.03

Related Problems

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Half scale
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Double scale
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Similar ratio
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1.5x scale

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.