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Finding the Fourth Proportional to 619.35, 929.17 and 218.65

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Solution

The fourth proportional to 619.35, 929.17 and 218.65 is: 328.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.35 : 929.17 = 218.65 : x
  2. Step 2: Convert to fraction form
    619.35/929.17 = 218.65/x
  3. Step 3: Cross multiply
    619.35x = 929.17 × 218.65
  4. Step 4: Simplify right side
    619.35x = 203,162.71
  5. Step 5: Solve for x
    x = 203,162.71/619.35
  6. Step 6: Final answer
    x = 328.03

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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.