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Finding the Fourth Proportional to 571.90, 857.36 and 485.32

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Solution

The fourth proportional to 571.90, 857.36 and 485.32 is: 727.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.90 : 857.36 = 485.32 : x
  2. Step 2: Convert to fraction form
    571.90/857.36 = 485.32/x
  3. Step 3: Cross multiply
    571.90x = 857.36 × 485.32
  4. Step 4: Simplify right side
    571.90x = 416,093.96
  5. Step 5: Solve for x
    x = 416,093.96/571.90
  6. Step 6: Final answer
    x = 727.56

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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.