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Finding the Fourth Proportional to 619.69, 929.70 and 186.86

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Solution

The fourth proportional to 619.69, 929.70 and 186.86 is: 280.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.69 : 929.70 = 186.86 : x
  2. Step 2: Convert to fraction form
    619.69/929.70 = 186.86/x
  3. Step 3: Cross multiply
    619.69x = 929.70 × 186.86
  4. Step 4: Simplify right side
    619.69x = 173,723.74
  5. Step 5: Solve for x
    x = 173,723.74/619.69
  6. Step 6: Final answer
    x = 280.34

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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.