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Finding the Fourth Proportional to 274.56, 411.60 and 130.20

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Solution

The fourth proportional to 274.56, 411.60 and 130.20 is: 195.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.56 : 411.60 = 130.20 : x
  2. Step 2: Convert to fraction form
    274.56/411.60 = 130.20/x
  3. Step 3: Cross multiply
    274.56x = 411.60 × 130.20
  4. Step 4: Simplify right side
    274.56x = 53,590.32
  5. Step 5: Solve for x
    x = 53,590.32/274.56
  6. Step 6: Final answer
    x = 195.19

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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.