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Finding the Fourth Proportional to 619.32, 928.90 and 186.51

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Solution

The fourth proportional to 619.32, 928.90 and 186.51 is: 279.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.32 : 928.90 = 186.51 : x
  2. Step 2: Convert to fraction form
    619.32/928.90 = 186.51/x
  3. Step 3: Cross multiply
    619.32x = 928.90 × 186.51
  4. Step 4: Simplify right side
    619.32x = 173,249.14
  5. Step 5: Solve for x
    x = 173,249.14/619.32
  6. Step 6: Final answer
    x = 279.74

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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.