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Finding the Fourth Proportional to 520.64, 718.44 and 310.82

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Solution

The fourth proportional to 520.64, 718.44 and 310.82 is: 428.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.64 : 718.44 = 310.82 : x
  2. Step 2: Convert to fraction form
    520.64/718.44 = 310.82/x
  3. Step 3: Cross multiply
    520.64x = 718.44 × 310.82
  4. Step 4: Simplify right side
    520.64x = 223,305.52
  5. Step 5: Solve for x
    x = 223,305.52/520.64
  6. Step 6: Final answer
    x = 428.91

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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.