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Finding the Fourth Proportional to 259.64, 357.98 and 172.16

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Solution

The fourth proportional to 259.64, 357.98 and 172.16 is: 237.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.64 : 357.98 = 172.16 : x
  2. Step 2: Convert to fraction form
    259.64/357.98 = 172.16/x
  3. Step 3: Cross multiply
    259.64x = 357.98 × 172.16
  4. Step 4: Simplify right side
    259.64x = 61,629.84
  5. Step 5: Solve for x
    x = 61,629.84/259.64
  6. Step 6: Final answer
    x = 237.37

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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.