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Finding the Fourth Proportional to 619.39, 929.26 and 345.68

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Solution

The fourth proportional to 619.39, 929.26 and 345.68 is: 518.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.39 : 929.26 = 345.68 : x
  2. Step 2: Convert to fraction form
    619.39/929.26 = 345.68/x
  3. Step 3: Cross multiply
    619.39x = 929.26 × 345.68
  4. Step 4: Simplify right side
    619.39x = 321,225.73
  5. Step 5: Solve for x
    x = 321,225.73/619.39
  6. Step 6: Final answer
    x = 518.61

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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.