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Finding the Fourth Proportional to 571.21, 856.64 and 160.25

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Solution

The fourth proportional to 571.21, 856.64 and 160.25 is: 240.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.21 : 856.64 = 160.25 : x
  2. Step 2: Convert to fraction form
    571.21/856.64 = 160.25/x
  3. Step 3: Cross multiply
    571.21x = 856.64 × 160.25
  4. Step 4: Simplify right side
    571.21x = 137,272.68
  5. Step 5: Solve for x
    x = 137,272.68/571.21
  6. Step 6: Final answer
    x = 240.32

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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.