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Finding the Fourth Proportional to 520.23, 718 and 323.81

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Solution

The fourth proportional to 520.23, 718 and 323.81 is: 446.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.23 : 718 = 323.81 : x
  2. Step 2: Convert to fraction form
    520.23/718 = 323.81/x
  3. Step 3: Cross multiply
    520.23x = 718 × 323.81
  4. Step 4: Simplify right side
    520.23x = 232,495.58
  5. Step 5: Solve for x
    x = 232,495.58/520.23
  6. Step 6: Final answer
    x = 446.91

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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.