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Finding the Fourth Proportional to 449.38, 619.99 and 283.33

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Solution

The fourth proportional to 449.38, 619.99 and 283.33 is: 390.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.38 : 619.99 = 283.33 : x
  2. Step 2: Convert to fraction form
    449.38/619.99 = 283.33/x
  3. Step 3: Cross multiply
    449.38x = 619.99 × 283.33
  4. Step 4: Simplify right side
    449.38x = 175,661.77
  5. Step 5: Solve for x
    x = 175,661.77/449.38
  6. Step 6: Final answer
    x = 390.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.