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Finding the Fourth Proportional to 571.95, 857.80 and 161.11

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Solution

The fourth proportional to 571.95, 857.80 and 161.11 is: 241.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.95 : 857.80 = 161.11 : x
  2. Step 2: Convert to fraction form
    571.95/857.80 = 161.11/x
  3. Step 3: Cross multiply
    571.95x = 857.80 × 161.11
  4. Step 4: Simplify right side
    571.95x = 138,200.16
  5. Step 5: Solve for x
    x = 138,200.16/571.95
  6. Step 6: Final answer
    x = 241.63

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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.