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Finding the Fourth Proportional to 305.28, 423.37 and 294.35

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Solution

The fourth proportional to 305.28, 423.37 and 294.35 is: 408.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.28 : 423.37 = 294.35 : x
  2. Step 2: Convert to fraction form
    305.28/423.37 = 294.35/x
  3. Step 3: Cross multiply
    305.28x = 423.37 × 294.35
  4. Step 4: Simplify right side
    305.28x = 124,617.21
  5. Step 5: Solve for x
    x = 124,617.21/305.28
  6. Step 6: Final answer
    x = 408.21

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.