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Finding the Fourth Proportional to 520.64, 718.41 and 299.51

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Solution

The fourth proportional to 520.64, 718.41 and 299.51 is: 413.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.64 : 718.41 = 299.51 : x
  2. Step 2: Convert to fraction form
    520.64/718.41 = 299.51/x
  3. Step 3: Cross multiply
    520.64x = 718.41 × 299.51
  4. Step 4: Simplify right side
    520.64x = 215,170.98
  5. Step 5: Solve for x
    x = 215,170.98/520.64
  6. Step 6: Final answer
    x = 413.28

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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.