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Finding the Fourth Proportional to 507.20, 700.11 and 310.73

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Solution

The fourth proportional to 507.20, 700.11 and 310.73 is: 428.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.20 : 700.11 = 310.73 : x
  2. Step 2: Convert to fraction form
    507.20/700.11 = 310.73/x
  3. Step 3: Cross multiply
    507.20x = 700.11 × 310.73
  4. Step 4: Simplify right side
    507.20x = 217,541.68
  5. Step 5: Solve for x
    x = 217,541.68/507.20
  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.