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Finding the Fourth Proportional to 619.36, 928.80 and 310.96

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Solution

The fourth proportional to 619.36, 928.80 and 310.96 is: 466.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.36 : 928.80 = 310.96 : x
  2. Step 2: Convert to fraction form
    619.36/928.80 = 310.96/x
  3. Step 3: Cross multiply
    619.36x = 928.80 × 310.96
  4. Step 4: Simplify right side
    619.36x = 288,819.65
  5. Step 5: Solve for x
    x = 288,819.65/619.36
  6. Step 6: Final answer
    x = 466.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.