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Finding the Fourth Proportional to 520.97, 718.91 and 299.99

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Solution

The fourth proportional to 520.97, 718.91 and 299.99 is: 413.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.97 : 718.91 = 299.99 : x
  2. Step 2: Convert to fraction form
    520.97/718.91 = 299.99/x
  3. Step 3: Cross multiply
    520.97x = 718.91 × 299.99
  4. Step 4: Simplify right side
    520.97x = 215,663.86
  5. Step 5: Solve for x
    x = 215,663.86/520.97
  6. Step 6: Final answer
    x = 413.97

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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.