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Finding the Fourth Proportional to 520.79, 718.83 and 299.88

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Solution

The fourth proportional to 520.79, 718.83 and 299.88 is: 413.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.79 : 718.83 = 299.88 : x
  2. Step 2: Convert to fraction form
    520.79/718.83 = 299.88/x
  3. Step 3: Cross multiply
    520.79x = 718.83 × 299.88
  4. Step 4: Simplify right side
    520.79x = 215,562.74
  5. Step 5: Solve for x
    x = 215,562.74/520.79
  6. Step 6: Final answer
    x = 413.92

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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.