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Finding the Fourth Proportional to 520.92, 718.87 and 299.87

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Solution

The fourth proportional to 520.92, 718.87 and 299.87 is: 413.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.92 : 718.87 = 299.87 : x
  2. Step 2: Convert to fraction form
    520.92/718.87 = 299.87/x
  3. Step 3: Cross multiply
    520.92x = 718.87 × 299.87
  4. Step 4: Simplify right side
    520.92x = 215,567.02
  5. Step 5: Solve for x
    x = 215,567.02/520.92
  6. Step 6: Final answer
    x = 413.82

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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.