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Finding the Fourth Proportional to 520.94, 718.65 and 321.68

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Solution

The fourth proportional to 520.94, 718.65 and 321.68 is: 443.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.94 : 718.65 = 321.68 : x
  2. Step 2: Convert to fraction form
    520.94/718.65 = 321.68/x
  3. Step 3: Cross multiply
    520.94x = 718.65 × 321.68
  4. Step 4: Simplify right side
    520.94x = 231,175.33
  5. Step 5: Solve for x
    x = 231,175.33/520.94
  6. Step 6: Final answer
    x = 443.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.