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Finding the Fourth Proportional to 260.80, 390.56 and 175.04

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Solution

The fourth proportional to 260.80, 390.56 and 175.04 is: 262.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.80 : 390.56 = 175.04 : x
  2. Step 2: Convert to fraction form
    260.80/390.56 = 175.04/x
  3. Step 3: Cross multiply
    260.80x = 390.56 × 175.04
  4. Step 4: Simplify right side
    260.80x = 68,363.62
  5. Step 5: Solve for x
    x = 68,363.62/260.80
  6. Step 6: Final answer
    x = 262.13

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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.