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Finding the Fourth Proportional to 520.56, 718.49 and 310.86

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Solution

The fourth proportional to 520.56, 718.49 and 310.86 is: 429.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.56 : 718.49 = 310.86 : x
  2. Step 2: Convert to fraction form
    520.56/718.49 = 310.86/x
  3. Step 3: Cross multiply
    520.56x = 718.49 × 310.86
  4. Step 4: Simplify right side
    520.56x = 223,350.58
  5. Step 5: Solve for x
    x = 223,350.58/520.56
  6. Step 6: Final answer
    x = 429.06

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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.