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Finding the Fourth Proportional to 648.43, 894.87 and 353.72

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Solution

The fourth proportional to 648.43, 894.87 and 353.72 is: 488.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.43 : 894.87 = 353.72 : x
  2. Step 2: Convert to fraction form
    648.43/894.87 = 353.72/x
  3. Step 3: Cross multiply
    648.43x = 894.87 × 353.72
  4. Step 4: Simplify right side
    648.43x = 316,527.17
  5. Step 5: Solve for x
    x = 316,527.17/648.43
  6. Step 6: Final answer
    x = 488.15

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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.