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Finding the Fourth Proportional to 449.13, 619.74 and 283.39

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Solution

The fourth proportional to 449.13, 619.74 and 283.39 is: 391.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.13 : 619.74 = 283.39 : x
  2. Step 2: Convert to fraction form
    449.13/619.74 = 283.39/x
  3. Step 3: Cross multiply
    449.13x = 619.74 × 283.39
  4. Step 4: Simplify right side
    449.13x = 175,628.12
  5. Step 5: Solve for x
    x = 175,628.12/449.13
  6. Step 6: Final answer
    x = 391.04

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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.