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Finding the Fourth Proportional to 427.60, 640.80 and 184.04

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Solution

The fourth proportional to 427.60, 640.80 and 184.04 is: 275.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    427.60 : 640.80 = 184.04 : x
  2. Step 2: Convert to fraction form
    427.60/640.80 = 184.04/x
  3. Step 3: Cross multiply
    427.60x = 640.80 × 184.04
  4. Step 4: Simplify right side
    427.60x = 117,932.83
  5. Step 5: Solve for x
    x = 117,932.83/427.60
  6. Step 6: Final answer
    x = 275.80

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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.