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Finding the Fourth Proportional to 392.24, 587.64 and 305.84

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Solution

The fourth proportional to 392.24, 587.64 and 305.84 is: 458.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.24 : 587.64 = 305.84 : x
  2. Step 2: Convert to fraction form
    392.24/587.64 = 305.84/x
  3. Step 3: Cross multiply
    392.24x = 587.64 × 305.84
  4. Step 4: Simplify right side
    392.24x = 179,723.82
  5. Step 5: Solve for x
    x = 179,723.82/392.24
  6. Step 6: Final answer
    x = 458.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.