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Finding the Fourth Proportional to 481.57, 718.75 and 443.09

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Solution

The fourth proportional to 481.57, 718.75 and 443.09 is: 661.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.57 : 718.75 = 443.09 : x
  2. Step 2: Convert to fraction form
    481.57/718.75 = 443.09/x
  3. Step 3: Cross multiply
    481.57x = 718.75 × 443.09
  4. Step 4: Simplify right side
    481.57x = 318,470.94
  5. Step 5: Solve for x
    x = 318,470.94/481.57
  6. Step 6: Final answer
    x = 661.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.