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Finding the Fourth Proportional to 520.42, 717.95 and 352.31

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Solution

The fourth proportional to 520.42, 717.95 and 352.31 is: 486.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.42 : 717.95 = 352.31 : x
  2. Step 2: Convert to fraction form
    520.42/717.95 = 352.31/x
  3. Step 3: Cross multiply
    520.42x = 717.95 × 352.31
  4. Step 4: Simplify right side
    520.42x = 252,940.96
  5. Step 5: Solve for x
    x = 252,940.96/520.42
  6. Step 6: Final answer
    x = 486.03

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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.