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Finding the Fourth Proportional to 619.88, 929.78 and 187.03

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Solution

The fourth proportional to 619.88, 929.78 and 187.03 is: 280.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.88 : 929.78 = 187.03 : x
  2. Step 2: Convert to fraction form
    619.88/929.78 = 187.03/x
  3. Step 3: Cross multiply
    619.88x = 929.78 × 187.03
  4. Step 4: Simplify right side
    619.88x = 173,900.30
  5. Step 5: Solve for x
    x = 173,900.30/619.88
  6. Step 6: Final answer
    x = 280.54

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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.