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Finding the Fourth Proportional to 656.63, 984.94 and 271.88

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Solution

The fourth proportional to 656.63, 984.94 and 271.88 is: 407.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.63 : 984.94 = 271.88 : x
  2. Step 2: Convert to fraction form
    656.63/984.94 = 271.88/x
  3. Step 3: Cross multiply
    656.63x = 984.94 × 271.88
  4. Step 4: Simplify right side
    656.63x = 267,779.88
  5. Step 5: Solve for x
    x = 267,779.88/656.63
  6. Step 6: Final answer
    x = 407.81

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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.