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Finding the Fourth Proportional to 619.09, 928.65 and 186.25

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Solution

The fourth proportional to 619.09, 928.65 and 186.25 is: 279.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.09 : 928.65 = 186.25 : x
  2. Step 2: Convert to fraction form
    619.09/928.65 = 186.25/x
  3. Step 3: Cross multiply
    619.09x = 928.65 × 186.25
  4. Step 4: Simplify right side
    619.09x = 172,961.06
  5. Step 5: Solve for x
    x = 172,961.06/619.09
  6. Step 6: Final answer
    x = 279.38

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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.