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Finding the Fourth Proportional to 619.39, 929.09 and 330.76

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Solution

The fourth proportional to 619.39, 929.09 and 330.76 is: 496.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.39 : 929.09 = 330.76 : x
  2. Step 2: Convert to fraction form
    619.39/929.09 = 330.76/x
  3. Step 3: Cross multiply
    619.39x = 929.09 × 330.76
  4. Step 4: Simplify right side
    619.39x = 307,305.81
  5. Step 5: Solve for x
    x = 307,305.81/619.39
  6. Step 6: Final answer
    x = 496.14

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Double scale
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Similar ratio
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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.