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Finding the Fourth Proportional to 648.11, 894.41 and 353.40

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Solution

The fourth proportional to 648.11, 894.41 and 353.40 is: 487.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.11 : 894.41 = 353.40 : x
  2. Step 2: Convert to fraction form
    648.11/894.41 = 353.40/x
  3. Step 3: Cross multiply
    648.11x = 894.41 × 353.40
  4. Step 4: Simplify right side
    648.11x = 316,082.73
  5. Step 5: Solve for x
    x = 316,082.73/648.11
  6. Step 6: Final answer
    x = 487.70

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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.