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Finding the Fourth Proportional to 372.96, 556.80 and 308.64

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Solution

The fourth proportional to 372.96, 556.80 and 308.64 is: 460.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.96 : 556.80 = 308.64 : x
  2. Step 2: Convert to fraction form
    372.96/556.80 = 308.64/x
  3. Step 3: Cross multiply
    372.96x = 556.80 × 308.64
  4. Step 4: Simplify right side
    372.96x = 171,850.75
  5. Step 5: Solve for x
    x = 171,850.75/372.96
  6. Step 6: Final answer
    x = 460.78

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.