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Finding the Fourth Proportional to 579.50, 869.26 and 271.60

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Solution

The fourth proportional to 579.50, 869.26 and 271.60 is: 407.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.50 : 869.26 = 271.60 : x
  2. Step 2: Convert to fraction form
    579.50/869.26 = 271.60/x
  3. Step 3: Cross multiply
    579.50x = 869.26 × 271.60
  4. Step 4: Simplify right side
    579.50x = 236,091.02
  5. Step 5: Solve for x
    x = 236,091.02/579.50
  6. Step 6: Final answer
    x = 407.40

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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.