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Finding the Fourth Proportional to 619.89, 929.78 and 376.35

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Solution

The fourth proportional to 619.89, 929.78 and 376.35 is: 564.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.89 : 929.78 = 376.35 : x
  2. Step 2: Convert to fraction form
    619.89/929.78 = 376.35/x
  3. Step 3: Cross multiply
    619.89x = 929.78 × 376.35
  4. Step 4: Simplify right side
    619.89x = 349,922.70
  5. Step 5: Solve for x
    x = 349,922.70/619.89
  6. Step 6: Final answer
    x = 564.49

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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.