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Finding the Fourth Proportional to 520, 717.60 and 323.54

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Solution

The fourth proportional to 520, 717.60 and 323.54 is: 446.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    520 : 717.60 = 323.54 : x
  2. Step 2: Convert to fraction form
    520/717.60 = 323.54/x
  3. Step 3: Cross multiply
    520x = 717.60 × 323.54
  4. Step 4: Simplify right side
    520x = 232,172.30
  5. Step 5: Solve for x
    x = 232,172.30/520
  6. Step 6: Final answer
    x = 446.49

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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.