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Finding the Fourth Proportional to 469.80, 648.12 and 351.96

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Solution

The fourth proportional to 469.80, 648.12 and 351.96 is: 485.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.80 : 648.12 = 351.96 : x
  2. Step 2: Convert to fraction form
    469.80/648.12 = 351.96/x
  3. Step 3: Cross multiply
    469.80x = 648.12 × 351.96
  4. Step 4: Simplify right side
    469.80x = 228,112.32
  5. Step 5: Solve for x
    x = 228,112.32/469.80
  6. Step 6: Final answer
    x = 485.55

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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.