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Finding the Fourth Proportional to 469.76, 648.32 and 273.39

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Solution

The fourth proportional to 469.76, 648.32 and 273.39 is: 377.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.76 : 648.32 = 273.39 : x
  2. Step 2: Convert to fraction form
    469.76/648.32 = 273.39/x
  3. Step 3: Cross multiply
    469.76x = 648.32 × 273.39
  4. Step 4: Simplify right side
    469.76x = 177,242.84
  5. Step 5: Solve for x
    x = 177,242.84/469.76
  6. Step 6: Final answer
    x = 377.31

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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.