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Finding the Fourth Proportional to 469.60, 648.28 and 304.08

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Solution

The fourth proportional to 469.60, 648.28 and 304.08 is: 419.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.60 : 648.28 = 304.08 : x
  2. Step 2: Convert to fraction form
    469.60/648.28 = 304.08/x
  3. Step 3: Cross multiply
    469.60x = 648.28 × 304.08
  4. Step 4: Simplify right side
    469.60x = 197,128.98
  5. Step 5: Solve for x
    x = 197,128.98/469.60
  6. Step 6: Final answer
    x = 419.78

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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.