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Finding the Fourth Proportional to 259.45, 357.99 and 172.07

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Solution

The fourth proportional to 259.45, 357.99 and 172.07 is: 237.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.45 : 357.99 = 172.07 : x
  2. Step 2: Convert to fraction form
    259.45/357.99 = 172.07/x
  3. Step 3: Cross multiply
    259.45x = 357.99 × 172.07
  4. Step 4: Simplify right side
    259.45x = 61,599.34
  5. Step 5: Solve for x
    x = 61,599.34/259.45
  6. Step 6: Final answer
    x = 237.42

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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.