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Finding the Fourth Proportional to 507.92, 700.64 and 311.44

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Solution

The fourth proportional to 507.92, 700.64 and 311.44 is: 429.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.92 : 700.64 = 311.44 : x
  2. Step 2: Convert to fraction form
    507.92/700.64 = 311.44/x
  3. Step 3: Cross multiply
    507.92x = 700.64 × 311.44
  4. Step 4: Simplify right side
    507.92x = 218,207.32
  5. Step 5: Solve for x
    x = 218,207.32/507.92
  6. Step 6: Final answer
    x = 429.61

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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.