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Finding the Fourth Proportional to 260.61, 359.50 and 172.15

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Solution

The fourth proportional to 260.61, 359.50 and 172.15 is: 237.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.61 : 359.50 = 172.15 : x
  2. Step 2: Convert to fraction form
    260.61/359.50 = 172.15/x
  3. Step 3: Cross multiply
    260.61x = 359.50 × 172.15
  4. Step 4: Simplify right side
    260.61x = 61,885.27
  5. Step 5: Solve for x
    x = 61,885.27/260.61
  6. Step 6: Final answer
    x = 237.46

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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.