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Finding the Fourth Proportional to 520.67, 718.49 and 299.61

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Solution

The fourth proportional to 520.67, 718.49 and 299.61 is: 413.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.67 : 718.49 = 299.61 : x
  2. Step 2: Convert to fraction form
    520.67/718.49 = 299.61/x
  3. Step 3: Cross multiply
    520.67x = 718.49 × 299.61
  4. Step 4: Simplify right side
    520.67x = 215,266.79
  5. Step 5: Solve for x
    x = 215,266.79/520.67
  6. Step 6: Final answer
    x = 413.44

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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.