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Finding the Fourth Proportional to 619.99, 929.99 and 249.80

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Solution

The fourth proportional to 619.99, 929.99 and 249.80 is: 374.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.99 : 929.99 = 249.80 : x
  2. Step 2: Convert to fraction form
    619.99/929.99 = 249.80/x
  3. Step 3: Cross multiply
    619.99x = 929.99 × 249.80
  4. Step 4: Simplify right side
    619.99x = 232,311.50
  5. Step 5: Solve for x
    x = 232,311.50/619.99
  6. Step 6: Final answer
    x = 374.70

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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.