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Finding the Fourth Proportional to 571.78, 856.52 and 263.20

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Solution

The fourth proportional to 571.78, 856.52 and 263.20 is: 394.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.78 : 856.52 = 263.20 : x
  2. Step 2: Convert to fraction form
    571.78/856.52 = 263.20/x
  3. Step 3: Cross multiply
    571.78x = 856.52 × 263.20
  4. Step 4: Simplify right side
    571.78x = 225,436.06
  5. Step 5: Solve for x
    x = 225,436.06/571.78
  6. Step 6: Final answer
    x = 394.27

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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.