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Finding the Fourth Proportional to 684.28, 944.19 and 404.49

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Solution

The fourth proportional to 684.28, 944.19 and 404.49 is: 558.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.28 : 944.19 = 404.49 : x
  2. Step 2: Convert to fraction form
    684.28/944.19 = 404.49/x
  3. Step 3: Cross multiply
    684.28x = 944.19 × 404.49
  4. Step 4: Simplify right side
    684.28x = 381,918.95
  5. Step 5: Solve for x
    x = 381,918.95/684.28
  6. Step 6: Final answer
    x = 558.13

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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.