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Finding the Fourth Proportional to 520.79, 718.95 and 324.37

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Solution

The fourth proportional to 520.79, 718.95 and 324.37 is: 447.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.79 : 718.95 = 324.37 : x
  2. Step 2: Convert to fraction form
    520.79/718.95 = 324.37/x
  3. Step 3: Cross multiply
    520.79x = 718.95 × 324.37
  4. Step 4: Simplify right side
    520.79x = 233,205.81
  5. Step 5: Solve for x
    x = 233,205.81/520.79
  6. Step 6: Final answer
    x = 447.79

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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.