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Finding the Fourth Proportional to 571.76, 856.49 and 339.96

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Solution

The fourth proportional to 571.76, 856.49 and 339.96 is: 509.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.76 : 856.49 = 339.96 : x
  2. Step 2: Convert to fraction form
    571.76/856.49 = 339.96/x
  3. Step 3: Cross multiply
    571.76x = 856.49 × 339.96
  4. Step 4: Simplify right side
    571.76x = 291,170.64
  5. Step 5: Solve for x
    x = 291,170.64/571.76
  6. Step 6: Final answer
    x = 509.26

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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.