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Finding the Fourth Proportional to 571.57, 857.25 and 242.40

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Solution

The fourth proportional to 571.57, 857.25 and 242.40 is: 363.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.57 : 857.25 = 242.40 : x
  2. Step 2: Convert to fraction form
    571.57/857.25 = 242.40/x
  3. Step 3: Cross multiply
    571.57x = 857.25 × 242.40
  4. Step 4: Simplify right side
    571.57x = 207,800.61
  5. Step 5: Solve for x
    x = 207,800.61/571.57
  6. Step 6: Final answer
    x = 363.56

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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.