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Finding the Fourth Proportional to 571.51, 857.28 and 395.64

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Solution

The fourth proportional to 571.51, 857.28 and 395.64 is: 593.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.51 : 857.28 = 395.64 : x
  2. Step 2: Convert to fraction form
    571.51/857.28 = 395.64/x
  3. Step 3: Cross multiply
    571.51x = 857.28 × 395.64
  4. Step 4: Simplify right side
    571.51x = 339,170.14
  5. Step 5: Solve for x
    x = 339,170.14/571.51
  6. Step 6: Final answer
    x = 593.47

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Double scale
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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.