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Finding the Fourth Proportional to 260.23, 358.95 and 172.75

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Solution

The fourth proportional to 260.23, 358.95 and 172.75 is: 238.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.23 : 358.95 = 172.75 : x
  2. Step 2: Convert to fraction form
    260.23/358.95 = 172.75/x
  3. Step 3: Cross multiply
    260.23x = 358.95 × 172.75
  4. Step 4: Simplify right side
    260.23x = 62,008.61
  5. Step 5: Solve for x
    x = 62,008.61/260.23
  6. Step 6: Final answer
    x = 238.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.