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Finding the Fourth Proportional to 648.13, 894.40 and 353.39

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Solution

The fourth proportional to 648.13, 894.40 and 353.39 is: 487.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.13 : 894.40 = 353.39 : x
  2. Step 2: Convert to fraction form
    648.13/894.40 = 353.39/x
  3. Step 3: Cross multiply
    648.13x = 894.40 × 353.39
  4. Step 4: Simplify right side
    648.13x = 316,072.02
  5. Step 5: Solve for x
    x = 316,072.02/648.13
  6. Step 6: Final answer
    x = 487.67

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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.