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Finding the Fourth Proportional to 571.60, 856.45 and 480.34

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Solution

The fourth proportional to 571.60, 856.45 and 480.34 is: 719.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.60 : 856.45 = 480.34 : x
  2. Step 2: Convert to fraction form
    571.60/856.45 = 480.34/x
  3. Step 3: Cross multiply
    571.60x = 856.45 × 480.34
  4. Step 4: Simplify right side
    571.60x = 411,387.19
  5. Step 5: Solve for x
    x = 411,387.19/571.60
  6. Step 6: Final answer
    x = 719.71

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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.