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Finding the Fourth Proportional to 619.58, 929.21 and 186.68

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Solution

The fourth proportional to 619.58, 929.21 and 186.68 is: 279.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.58 : 929.21 = 186.68 : x
  2. Step 2: Convert to fraction form
    619.58/929.21 = 186.68/x
  3. Step 3: Cross multiply
    619.58x = 929.21 × 186.68
  4. Step 4: Simplify right side
    619.58x = 173,464.92
  5. Step 5: Solve for x
    x = 173,464.92/619.58
  6. Step 6: Final answer
    x = 279.97

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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.